FN 57 Magazines dissected ***added more pictures***

Discuss the FN Five-seveN line of pistols and accessories.

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mekunic
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FN 57 Magazines dissected ***added more pictures***

Post by mekunic » 16 Aug 2009, 15:21

Here is my way of saying thanks to every one on this forum. I might not post A lot but i do read a lot. i hope this can help

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Left to Right: Promag 30rnd, Promag 20rnd, FN 20rnd, FN 10rnd

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Top To bottom: FN 10rnd, FN 20rnd, Promag 20 RND, Promag 30rnd, CMMG 30rnd EXtenshon

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Left to Right: FN 10rnd, FN 20rnd, Promag 20rnd, Promag 30rnd

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Left to Right: Promag 30rnd, (extension removed) Promag 20rnd, fn 20rnd fn 10rnd.

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Top to bottom: FN 10rnd, FN 20rnd, Promag 20rnd, Promag 30 rnd, CMMG 30 rnd spring

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Left to Right: FN 10rnd, FN 20rnd, Promag 20rnd, Promag 30rnd

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Left to Right: FN 10rnd, FN 20rnd, Promag 20rnd, Promag 30rnd

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Left: Promag Extension Right: CMMG Extension

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Left: Promag Extension Right: CMMG Extension

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The Factory magazines are Clean and there are little to no Plastic Flash... They have markings that indicate FN or 5.7x28... there is no little to no drag when removing or installing the followers. The 10 rounder have a Gray Followers but are identical and will swap to all the bodies.

Promags: the 20rnd spring is to short... the 30rnd is about the same length as the cmmg. There body and there flowwers have lots of plastic flash that causes problems. there followers drag on the body, but if you install the FN follower it does NOT. all the parts weather FN or Promag are interchangeable. Promags have there logo on the base plate and there are pins visible on the body near the lips....

For the Price of Promags. 20rnd $25 30rnd $35 you get what you pay for. but with a little work of cleaning the flash and the followers and a new spring (Elite Spring??dunno i don't own one), you might be able to make a Reliable Magazine..

I Have more pictures but i think the once i posted should do the job.

-Mekunic

Here are a few more pictures that i think everyone can benefit from...

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Left to Right : Promag 30rnd, Promag 20rnd, FN 20rnd, FN 10rnd.. Note that the Promags have a "dash metal pin" while the FN 20rnd has a "round pin"... FN 10rnd has no pin...

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Left to Right : FN 10rnd , FN 20rnd, Promag 20rnd, Promag 30rnd. Note that the rough sanding marks are more pronounced on the Promags while the Fn has very fine marks..

Since 20rnds is the standard ill give you a more pictures between the two....

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Sorry i added so much pictures, but i wanted to give all of you as much detail so you can make the decision to buy FN or Promag... On my testing with the 20rnders, once i clean up all the plastic flash and used the FN spring in the Promag body it worked as good as my Factory... The ProMag spring is too short and weak... i can put in 21rnds in the ProMag magazine, but once i installed the FN spring it only held 20rnds...

( Mod's sorry for editing so much )
Last edited by mekunic on 18 Aug 2009, 20:45, edited 3 times in total.

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Re: FN 57 Magazines dissected

Post by Wollychop » 16 Aug 2009, 15:23

Fantastic. Definitely wiki-worthy.

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Re: FN 57 Magazines dissected

Post by jmz5 » 16 Aug 2009, 16:07

Definitely wiki-worthy!

Very nice, thanks!
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Re: FN 57 Magazines dissected

Post by Grantness » 16 Aug 2009, 16:24

:agree: Nice work :thumb:

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Re: FN 57 Magazines dissected

Post by reads » 16 Aug 2009, 19:52

Thank you for the great comparison.

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Re: FN 57 Magazines dissected

Post by panzermk2 » 16 Aug 2009, 19:57

Nice review! :thumb:
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Re: FN 57 Magazines dissected

Post by ynoty3k » 17 Aug 2009, 01:25

+1 and ditto all those above me. :thumb:

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Re: FN 57 Magazines dissected

Post by f3rr37 » 17 Aug 2009, 08:19

Awesome, thanks for posting! If you want, we can add you to the wiki group so that you can login and create a wiki page for this.

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Re: FN 57 Magazines dissected

Post by Wollychop » 17 Aug 2009, 08:53

should we sticky this?

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Re: FN 57 Magazines dissected

Post by f3rr37 » 17 Aug 2009, 08:55

Sticky'd.

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Re: FN 57 Magazines dissected

Post by mekunic » 17 Aug 2009, 09:17

Thanks everyone......

I'm gonna make a few additions later this week... I may possibly have a Promag with no markings being sold as Original... I can't check now cause i left the Mag in friends car :(

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Re: FN 57 Magazines dissected

Post by gw45acp » 17 Aug 2009, 09:36

After reading your review, I'm glad I purchased the FN brand product.
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Re: FN 57 Magazines dissected

Post by Captan Harold D » 17 Aug 2009, 09:59

My thanks added to all the above.
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Re: FN 57 Magazines dissected

Post by gotants » 17 Aug 2009, 19:06

I like the look of the promag 30 rounder. Is the extension sold separately?

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Re: FN 57 Magazines dissected

Post by ynoty3k » 17 Aug 2009, 19:15

not that I have seen goants, but I haven't seen everything. Surprising, I know!

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Re: FN 57 Magazines dissected

Post by mekunic » 17 Aug 2009, 21:10

gotants wrote:I like the look of the promag 30 rounder. Is the extension sold separately?
Nope... i talked to a few vendors at the gun show and all said ProMag is only selling them as complete magazines..

But all the 20rnd/30rnd Magazines parts weather its Original/Promag/CMMG are interchangeable...You take them apart like you would a normal 20rnd magazine. The extension just needs a bit more squeeze to release the base plate.

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Re: FN 57 Magazines dissected ***added more pictures***

Post by Captan Harold D » 06 Sep 2009, 07:23

Has anyone used the Promag 20 with the Elite spring made for the FN5.7? If so what are your thoughts? I'de love to buy a couple of FN 20ies, cause I have Elite springs waiting for them.
And thanks again Mekunic
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Re: FN 57 Magazines dissected ***added more pictures***

Post by DREWES » 11 Sep 2009, 21:32

Great post!
Thank you....

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Re: FN 57 Magazines dissected ***added more pictures***

Post by Augustus » 13 Sep 2009, 18:24

Hmmmm.... If one were to say... Buy ten CMMG extensions... Could one theoretically make a huge magazine that holds something like 100 rounds by training all of the extensions together, or do the extensions have a built in baseplate that would prevent this? (Of course you would need a huge spring to do this...)

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Re: FN 57 Magazines dissected ***added more pictures***

Post by Cyberfly » 13 Sep 2009, 18:39

Wonderful post. Excellent compilation of info. :thumb:
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Re: FN 57 Magazines dissected ***added more pictures***

Post by Esteves » 13 Sep 2009, 19:43

Augustus wrote:Hmmmm.... If one were to say... Buy ten CMMG extensions... Could one theoretically make a huge magazine that holds something like 100 rounds by training all of the extensions together, or do the extensions have a built in baseplate that would prevent this? (Of course you would need a huge spring to do this...)
CMMG intended to make the magazine extensions stackable - unfortunately what they produced doesn't actually stack. Personally - 30 is nice, but I'd rather have two 20s than a 40.

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Re: FN 57 Magazines dissected ***added more pictures***

Post by Augustus » 13 Sep 2009, 21:08

Esteves wrote:CMMG intended to make the magazine extensions stackable - unfortunately what they produced doesn't actually stack. Personally - 30 is nice, but I'd rather have two 20s than a 40.

archive/index.php_t-1830.html" onclick="window.open(this.href);return false;

Hmm... They don't even stack just for looks...? I wonder why that is...

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Re: FN 57 Magazines dissected ***added more pictures***

Post by DAUG » 14 Sep 2009, 09:50

Wow, I likey this post!

Agree w/ 30 being more than enough for extended use. I see no practical purpose stacking to 100 rnds other than to have a walking stick for a gun.
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Re: FN 57 Magazines dissected ***added more pictures***

Post by DarkWater » 14 Sep 2009, 09:59

DAUG wrote:Wow, I likey this post!

Agree w/ 30 being more than enough for extended use. I see no practical purpose stacking to 100 rnds other than to have a walking stick for a gun.
oh come on, if you split two stacks, you could have a long bipod and 1Kr oudns to shoot :-)

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Re: FN 57 Magazines dissected ***added more pictures***

Post by lazi » 01 Nov 2009, 11:30

Don't know how I missed this lost for this long. :huh:

The extensions are on my "to get" list. I think this postis gonna help out a good bit.

Thanks!!! :thumb:

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Re: FN 57 Magazines dissected ***added more pictures***

Post by panzermk2 » 01 Nov 2009, 11:58

I need to take a pick, but the recent batch of FN factory mags no longer have that small piece of metal in the mag body.

Here we go. Also the FN verbiage is no longer present. Also the number of small hole like indents have changed.

Side note the basis on these are a MF to remove. I installed EA extra power springs in all of the and I had to use channel lock pliers to compress the mag body enough to get the bases off.

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and one for Justin

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Re: FN 57 Magazines dissected ***added more pictures***

Post by fatherfoof » 01 Nov 2009, 14:57

You are a talented photographer. :thumb:
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Re: FN 57 Magazines dissected ***added more pictures***

Post by Buffman » 08 Nov 2009, 19:39

I dont think any of my factory mags have FN verbiage on them.

Where can you buy the pro-mag units from? Or is direct from them the only option?

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Re: FN 57 Magazines dissected ***added more pictures***

Post by blueorison » 08 Nov 2009, 21:04

ew promags ewwwww

for as long as mags last w/ the EA springs, just do the right thing.

Vote Republican.

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Re: FN 57 Magazines dissected ***added more pictures***

Post by SeaHawkDriver-B » 11 Nov 2009, 16:29

For different weapons I've had bad results with ProMags, maybe they're better with the 5-7. At first I saw the ProMag extension and I was like "thats cool it matches", but after looking at it on the gun, it looks beyond stupid. I like the look of a mag extender, not the look of a gun thats WAYYY out of proportion.

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Re: FN 57 Magazines dissected ***added more pictures***

Post by Outlaw54 » 09 Jul 2010, 19:39

SeaHawkDriver-B wrote:For different weapons I've had bad results with ProMags, maybe they're better with the 5-7. At first I saw the ProMag extension and I was like "thats cool it matches", but after looking at it on the gun, it looks beyond stupid. I like the look of a mag extender, not the look of a gun thats WAYYY out of proportion.
I agree, but I hate to reload. I have a 6 pocket mag pouch that I keep 4 of the 30's in and 2 of the 20's with one 30 in the weapon. When I go to the range I blow off 180 rounds and the ProMags work as well as the 3 factory mags, I don't see and flashing or burrs at all. It looks like they are made to the same specs. Now if I can find them in Desert Earth, I would buy at least one!

Image

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Re: FN 57 Magazines dissected ***added more pictures***

Post by variable » 17 Apr 2011, 10:27

Here is a photo of the rare original FN Tactical magazine without the magazine safety bump on the right side.

http://i174.photobucket.com/albums/w96/ ... IM1676.jpg

Just an added photo for reference.

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Re: FN 57 Magazines dissected ***added more pictures***

Post by jsedwards25 » 02 May 2011, 18:21

What's the tolerance on the stock FN mag springs to stay compressed for long periods of time? If I were to load one to capacity and let it sit for an extended period of time (years) would it hold up and still perform?

I ask because when the P-Mags came out from Magpul, there was a lot of hype around the advantage of being able to load 'em up, cap 'em, and let 'em sit until retirement age (or the zombie apocalypse....whatever.) It's not really a *need*, more a curiosity.

Thanks!

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Re: FN 57 Magazines dissected ***added more pictures***

Post by ynoty3k » 02 May 2011, 19:16

Holy zombie thread batman!

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Re: FN 57 Magazines dissected ***added more pictures***

Post by blueorison » 02 May 2011, 20:36

jsedwards25 wrote:What's the tolerance on the stock FN mag springs to stay compressed for long periods of time? If I were to load one to capacity and let it sit for an extended period of time (years) would it hold up and still perform?

I ask because when the P-Mags came out from Magpul, there was a lot of hype around the advantage of being able to load 'em up, cap 'em, and let 'em sit until retirement age (or the zombie apocalypse....whatever.) It's not really a *need*, more a curiosity.

Thanks!
This has been covered before.

It would be the same as the PMAG springs. As most springs. The repeated compressions matter more in wearing a spring down than the one time held compression.

That said, over time, compression of both PMAG springs and FsN and any mag springs will distort it.

Hope that helps.
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Re: FN 57 Magazines dissected ***added more pictures***

Post by american lockpicker » 20 Jul 2011, 21:04

I've been after some of those "made in Belgium" mags for about a year now, any ideas on where to find 1-3 new ones?

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Re: FN 57 Magazines dissected ***added more pictures***

Post by jaker123 » 15 Aug 2011, 02:45

had all jams and not feeding problems with the factory Pro-Mag 30 after only 30 days, 30 rounds in it!!
maybe i need another spring in it or just throw it in the trash!!!

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Re: FN 57 Magazines dissected ***added more pictures***

Post by Valorius » 07 Sep 2011, 15:33

From what i've read the only way you'll get the Promag to work is to use the FN mag body and follower, and the extended spring from the CMMG kit.

I took a 30rd CMMG apart today, and loaded it up to see how many rounds fit in the FN mag body before the follower extends down into CMMG extension, where there is the potential for the follower hanging up on the mag seams.

It's 27rds.

As long as you only load 27rds in the magazine, there is no possibility of the follower hanging up on the seams at all because the top of it never gets into the CMMG extension at all. :)

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Re: FN 57 Magazines dissected ***added more pictures***

Post by blueorison » 07 Sep 2011, 16:05

Valorius wrote:From what i've read the only way you'll get the Promag to work is to use the FN mag body and follower, and the extended spring from the CMMG kit.

I took a 30rd CMMG apart today, and loaded it up to see how many rounds fit in the FN mag body before the follower extends down into CMMG extension, where there is the potential for the follower hanging up on the mag seams.

It's 27rds.

As long as you only load 27rds in the magazine, there is no possibility of the follower hanging up on the seams at all because the top of it never gets into the CMMG extension at all. :)
VERY interesting. I will try this. Mine is smoothed down with fine-grit sandpaper, but will misfeed the 2nd or 3rd round and is not reliable for the first few. I think I'll try to get an EA extra-powered sling and see if it works. I only use the 30 rounder for competition so it's not a critical issue, as I'll just pick up 1.5-2 seconds on a reload.

Thanks for the info. Will let you know if it works.
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Re: FN 57 Magazines dissected ***added more pictures***

Post by Valorius » 07 Sep 2011, 16:41

I was hand cycling the weapon today over and over from 27rds to 20, and it appears to work perfectly (as logic dictates it should since the follower lip never reaches the problem seam area). I'll be going to the range within the next week and will test it extensively to make sure it's 100% reliable, but i am fully expecting it to work.

Elite sells an extra strength spring for the extended 30rd magazines?

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Re: FN 57 Magazines dissected ***added more pictures***

Post by blueorison » 07 Sep 2011, 16:49

Just the 20 rounder extra power spring, which will work in the 30 rounder.
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Re: FN 57 Magazines dissected ***added more pictures***

Post by acmeraptor » 12 Sep 2011, 09:14

Augustus wrote:Hmmmm.... If one were to say... Buy ten CMMG extensions... Could one theoretically make a huge magazine that holds something like 100 rounds by training all of the extensions together, or do the extensions have a built in baseplate that would prevent this? (Of course you would need a huge spring to do this...)
The CMMG extensions do not have built in baseplates, they use the one that comes with the FN mag. They do come with a replacement spring but as far as chaining them together to make 100rnd mags, no one has a spring that big and who wants a mag that when the gun is at eye level reaches down to your chest? :)

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Re: FN 57 Magazines dissected ***added more pictures***

Post by blueorison » 12 Sep 2011, 15:57

acmeraptor wrote:
Augustus wrote:Hmmmm.... If one were to say... Buy ten CMMG extensions... Could one theoretically make a huge magazine that holds something like 100 rounds by training all of the extensions together, or do the extensions have a built in baseplate that would prevent this? (Of course you would need a huge spring to do this...)
The CMMG extensions do not have built in baseplates, they use the one that comes with the FN mag. They do come with a replacement spring but as far as chaining them together to make 100rnd mags, no one has a spring that big and who wants a mag that when the gun is at eye level reaches down to your chest? :)
Honestly, I wouldn't be shocked, AC. People have done dumber things that they deem cool or, in their minds, applicable to some fantasy scenario in which they get attacked by a mob of monsters. In fact, there are many of the examples on this forum, sadly. Although not as frequent in percentage as other forums, it is still sad.
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Re: FN 57 Magazines dissected ***added more pictures***

Post by SoCal Gunner » 12 Sep 2011, 19:51

Blue,

You're totally going to be eaten by a zombie.

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Re: FN 57 Magazines dissected ***added more pictures***

Post by blueorison » 12 Sep 2011, 20:42

:(

Maybe I can throw my tactical friend in front of me, he likes to wear Level IV plates he bought. That should protect him, right?

If not, save me!
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Re: FN 57 Magazines dissected ***added more pictures***

Post by PainKillaX » 12 Sep 2011, 21:09

blueorison wrote::(

Maybe I can throw my tactical friend in front of me, he likes to wear Level IV plates he bought. That should protect him, right?

If not, save me!
You'd serve him to the zombies on a plate?

:facepalm: :p

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Re: FN 57 Magazines dissected ***added more pictures***

Post by blueorison » 12 Sep 2011, 21:27

PainKillaX wrote:
blueorison wrote::(

Maybe I can throw my tactical friend in front of me, he likes to wear Level IV plates he bought. That should protect him, right?

If not, save me!
You'd serve him to the zombies on a plate?

:facepalm: :p
Yeah, with no qualms. I mean, he probably fantasizes about zombies all the time and he has all the gear to protect him (skill?) in event of "SHTF" or "ZOMBIE APOCALYPSE", so I'd be doing him a favor by making his dreams come true, right?

Anyway, we should merge this thread with the other CMMG thread, and get back on topic.

We will be testing out a CMMG extension in two weeks.
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Re: FN 57 Magazines dissected ***added more pictures***

Post by acmeraptor » 13 Sep 2011, 07:43

blueorison wrote: Anyway, we should merge this thread with the other CMMG thread, and get back on topic.

We will be testing out a CMMG extension in two weeks.
My bad, I didn't even notice the extra pages to this thread. :facepalm:

Why test, mine work fine!

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Re: FN 57 Magazines dissected ***added more pictures***

Post by sib1948 » 19 Sep 2011, 20:00

Got 2 Promag 30 round magazines this week and they worked well, but did not slide in and out or seat as easily as the FN mags. Purchased 2 sets of metal lip protectors from Elite Ammunition, but they have not yet arrived. The pictures of the various mags were awesome.

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Re: FN 57 Magazines dissected ***added more pictures***

Post by Mithridates » 30 Nov 2011, 20:53

I just bought a new FIVESEVEN (can't deal with the capitalization thing), and noticed that my mags do not have the metal inserts, at least no metal is visible inside the magazine at the top. (I also noticed the earlier post that FN appears to be making them like this now.)

My question is if people have noticed any adverse consequences from this change, either with regard to the durability of the mags or reliability of feeding. As I recall, Glock tried using all-plastic magazines at first, then went to metal inserts. Surely there must have been a reason for this.

Also, I'm searching for a reason why there were 3 failures to feed on my new FN in the hundred rounds I put through it today (yes, blue-tipped factory ammo). The rounds wedged at an angle, point hung up on the chamber rim.

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Re: FN 57 Magazines dissected ***added more pictures***

Post by panzermk2 » 30 Nov 2011, 22:08

Mithridates wrote:I just bought a new FIVESEVEN (can't deal with the capitalization thing), and noticed that my mags do not have the metal inserts, at least no metal is visible inside the magazine at the top. (I also noticed the earlier post that FN appears to be making them like this now.)

My question is if people have noticed any adverse consequences from this change, either with regard to the durability of the mags or reliability of feeding. As I recall, Glock tried using all-plastic magazines at first, then went to metal inserts. Surely there must have been a reason for this.

In correct. FNH has not changed how they make their mags recently and the steel is molded into the top lips of the magazine.

Mithridates wrote: Also, I'm searching for a reason why there were 3 failures to feed on my new FN in the hundred rounds I put through it today (yes, blue-tipped factory ammo). The rounds wedged at an angle, point hung up on the chamber rim.

New gun or crappy SS197 ammo.
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Re: FN 57 Magazines dissected ***added more pictures***

Post by Mithridates » 01 Dec 2011, 14:47

panzermk2 wrote: In correct. FNH has not changed how they make their mags recently and the steel is molded into the top lips of the magazine.
I stand...er sit corrected. I took a closer look, and there is indeed some sheet metal molded into the magazine near the lips. The reason I didn't notice the metal is that it is matte black. In the pictures posted at the top of this thread, it looks like bare, silvery sheet metal. I'll see if I can figure out how to post pics to this forum.
panzermk2 wrote: New gun or crappy SS197 ammo.
It is indeed a brand new (not previously owned) gun. New factory SS197SR FN ammo, fresh out of the box. When you say "crappy SS197 ammo" do you mean that I may have gotten hold of a bad batch, or that SS197 ammo is all crap? (That would be bad news, as I just ordered 1K rounds of it...)

By the way, I picked up the notion that FN had eliminated the metal from the magazines from an old post of yours (which I perhaps misunderstood), dated Sun Nov 01, 2009 1:58 pm:
panzermk2 wrote: I need to take a pick, but the recent batch of FN factory mags no longer have that small piece of metal in the mag body.

Here we go. Also the FN verbiage is no longer present. Also the number of small hole like indents have changed.
Thanks for your reply!

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Re: FN 57 Magazines dissected ***added more pictures***

Post by panzermk2 » 01 Dec 2011, 15:06

I was referring to the spar of exposed metal at the back of the mag. This spar like a plastic model spar, holds the metal insert in place in the mold as the liquid polymer is injected into the mold.
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Re: FN 57 Magazines dissected ***added more pictures***

Post by Rapier1772 » 01 Dec 2011, 16:50

Mithridates wrote:I'll see if I can figure out how to post pics to this forum.
The "how to" for that is in my sig line.
Mithridates wrote:When you say "crappy SS197 ammo" do you mean that I may have gotten hold of a bad batch, or that SS197 ammo is all crap? (That would be bad news, as I just ordered 1K rounds of it...)
The 197 is anemic & made weak by FNH to appease the brady bunch peeps. EA's ammo makes better use of the capabilities of this round.
However, you shouldn't have any problems with using 197 once your FsN is broken in. I occasionally feed my FsN EA ammo & then but I primarily use 197s without any problems. I have even put EA's heavy duty recoil spring in mine & still have no problem with 197s.
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Re: FN 57 Magazines dissected ***added more pictures***

Post by Valorius » 09 Apr 2012, 03:52

Valorius wrote:I was hand cycling the weapon today over and over from 27rds to 20, and it appears to work perfectly (as logic dictates it should since the follower lip never reaches the problem seam area). I'll be going to the range within the next week and will test it extensively to make sure it's 100% reliable, but i am fully expecting it to work.

Elite sells an extra strength spring for the extended 30rd magazines?
I've tested the hell out of the technique of just using 27rds in the mag.

I actually load them to 27+1 in the gun, and 28 in all the spares. As long as the 28th round is chambered manually when you insert a fresh magazine it works perfectly.

I also tried loading them all to 30, even after shaving the seams, and i still had stoppages when they were fully loaded, so i will definitely be sticking with the downloading strategy.

I have 13x 30rd magazines, so i have a pretty good body of samples to work with and form a sound opinion on IMO.

Figured people might be interested in my results.

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Re: FN 57 Magazines dissected ***added more pictures***

Post by blueorison » 09 Apr 2012, 13:19

...
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Re: FN 57 Magazines dissected ***added more pictures***

Post by Airdog » 19 May 2012, 14:00

NEW MAGAZINE DESIGN AS OF LATE APRIL 2012.
FN has added a full length vertical rib inside the front of the magazine.


Arrows showing rib in the front of the magazine. Bottom of mag with bottom plate removed (left).
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Re: FN 57 Magazines dissected ***added more pictures***

Post by bhs235 » 29 Aug 2013, 12:40

Just a headsup, I have the new mag type Airdog pictures above, as well as the CMMG extensions. So first I want to say the extensions seem nice, with good springs. I only just got them in this morning, and only using one full mag, now 30 rounds in each of my 3 magazines, they fed fairly well; AFTER some grinding down of the new rib Airdog makes note of in his post. Just grinding at the baseplate end so the spring has a ramp to hit the rib seemed to do the trick, although the rib does make the included spring have a tighter than intended fit up the rest of the new mag type. I had one mag feed perfectly fine, one had one doublefeed, the other two(this after grinding). I guess its possible to grind or cut down the entire rib, but hopefully I'll get them working with out doing so. This is really only a fun gun for me though, so I cant say I'm terribly concerned over the performance.

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Re: FN 57 Magazines dissected ***added more pictures***

Post by Dennis MacGyver » 04 Sep 2013, 16:05

Since I travel, I wanted to have a couple of 10 round magazines be be compliant in certain states. So I bought a couple from a midwestern retailer. I thought they'd be made by FN, turned out to be Pro Mag (PM). My gun is new & the 3 original FN mag's that came with it are like the ones shown slightly before my post with the internal separator for the cartridge tips. The PM do not have this separator but the big problem, I have not live fired the PM's yet and see no reason to at this point, is inserting the mag into the gun. As soon as the mag contacts the mag release in the grip of the gun's magazine well, further insertion becomes increasingly difficult up to the point of locking into battery.

Then when you depress the mag release, the PM mag barely detaches, pops loose, from the gun and you must forcibly extract it from the magazine well of the gun.

I have e-mailed and phoned Pro Mag (twice) trying to speak with Tyler their mold engineer about what I see as the problem With these mag's. Both have a date code of 08-08. I don't know if this code is the manufacture date of the mag or the latest revision date of the mold.

I have contacted the retailer and asked them to hold back on selling these and their response seems to indicate they will. I prefer to work with Pro Mag to help them solve this problem but seeing I'm getting no response, I guess I'll have to send them back to the retailer as defective.

In review of the PM mag, the problem is the exterior width from the mag lock notches to the top where the cartridges are loaded into it. The angled surfaces in the aforementioned area are too wide and rub on the inside of the magazine well. The rest of the mag width towards the case portion of the cartridges seems fine.

It seems one person shortly before my post is experiencing the same problem as I am. The 10 and 20 round mags seem to use the same exterior housing, so the problem exists in both mag's.

Anyone else seen this issue with their PM mag's ??

Dennis

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Re: FN 57 Magazines dissected ***added more pictures***

Post by kismetcapitan » 03 Jan 2014, 12:45

well, that's interesting. The Mk2 I just got a few days ago...the magazine in the pistol had the new magazine with the vertical rib, but the two extras - no rib. Hope that isn't important, and also a bit weird that the Mk2 is new, the design change was over a year ago, and I'd still get old style mags?

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Re: FN 57 Magazines dissected ***added more pictures***

Post by Rapier1772 » 03 Jan 2014, 13:18

It's no biggie as long as they work, they are supposed to work in both models.

As with all production changes, some of the old style will be around for a while and remain in circulation. If I had to guess, they probably had the (old) spare mags in the case already, awaiting the switch over to the MkII. Then, once the new gun rolled out, they put in a new mag (probably also fresh from the production line), dropped it into the case, & shipped it out.

It's only a big deal if you're one of the OCD types who HAVE to have the same mags :laugh: Even then, you can probably just trade with someone to get all the same type.
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Re: FN 57 Magazines dissected ***added more pictures***

Post by Handgunner » 01 Mar 2014, 11:15

Hello
I am new to the forum but not FN products. I just picked up a new five-seven MKll. It goes nicely with my PS90 and FS2000.
My thoughts are about the mags. In the box I received one second gen mag with the ridge on the front lip running down the inside length of the mag. The ridge runs between the bullets. The other two mags do not have the ridge and are first gen mags. I called FN and a tech stated they are the same but for the ridge and work the same. The ridge was there to simplify production. He also stated they have a stockpile of the older style and just pick up mags to put in the pistol boxes. Dosen't make any diff in performance.
Anyone have any knowledge as to if one is more reliable than the other.
I know on mine the newer ridged one is more difficult to load with shells.
Thanks.

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Re: FN 57 Magazines dissected ***added more pictures***

Post by panzermk2 » 01 Mar 2014, 23:36

Bullsh!t the mag lips break off on the old style. That is why the rib is there and why I make and sell lip protectors for the old style mags.

"simplify production" What utter BS. A whole new set of injection molds? New Body? New followers? New springs? ALL had to be redesigned. Too add rib INSIDE to "simplify production"
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Re: FN 57 Magazines dissected ***added more pictures***

Post by Handgunner » 02 Mar 2014, 00:13

Jay
Thanks for the info. I knew it was crap. But how does the ridge in the front prevent breakage of the lips in back?

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Re: FN 57 Magazines dissected ***added more pictures***

Post by panzermk2 » 02 Mar 2014, 01:14

It is only the front lip that breaks. The main curved ones are steel reinforced. As you can see in this pic it's the front lip that the rounds are dragged across as they chamber is the breaking point. This mag's lips had broken and I installed our protector.

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Re: FN 57 Magazines dissected ***added more pictures***

Post by bruteandbear1 » 24 Mar 2014, 16:44

Thats funny all three of my magazines are the new style. I just got my mk2 about a month ago so maybe there stockpile ran out.

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Re: FN 57 Magazines dissected ***added more pictures***

Post by jimf5 » 28 Mar 2014, 14:20

Hi All:
I read this forum just about every other day, but don't post a lot. I saw an ad from CDNN about a month ago for the extensions from CMMG to make the mags 30 rounds for $9.95 and $4.95 shipping. I could not resist and bought 2 at this price. As I live in the desert about 45 miles away from Las Vegas it was a while before I could test them because of the wind here. Took them out last week and they performed flawlessly. Would recommend the for purchase.
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Re: FN 57 Magazines dissected ***added more pictures***

Post by bruteandbear1 » 01 Apr 2014, 10:16

Hey jim what magazines were hou using the gen 2 with the rib in the middle or the gen1 with no rib?

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Re: FN 57 Magazines dissected ***added more pictures***

Post by FNGuy » 07 Jul 2014, 16:32

panzermk2 wrote:Bullsh!t the mag lips break off on the old style. That is why the rib is there and why I make and sell lip protectors for the old style mags. etc.
Is FN warranty'g the old style mags if the lip breaks off? :?:

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Re: FN 57 Magazines dissected ***added more pictures***

Post by panzermk2 » 08 Jul 2014, 14:20

FNGuy wrote:
panzermk2 wrote:Bullsh!t the mag lips break off on the old style. That is why the rib is there and why I make and sell lip protectors for the old style mags. etc.
Is FN warranty'g the old style mags if the lip breaks off? :?:

NOPE and they refuse to sell just the magazine bodies.
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Re: FN 57 Magazines dissected ***added more pictures***

Post by grimmond » 08 Jul 2014, 17:19

panzermk2 wrote:
FNGuy wrote:
panzermk2 wrote:Bullsh!t the mag lips break off on the old style. That is why the rib is there and why I make and sell lip protectors for the old style mags. etc.
Is FN warranty'g the old style mags if the lip breaks off? :?:

NOPE and they refuse to sell just the magazine bodies.
Actually Jay they do warranty them if they break. This last year I had 2 break that I had not had the time to modify them with your kit yet. I called FNH and they had me mail them the mags. They sent me 2 of the new versions as replacements. It took about 3 weeks from start to finish.
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Re: FN 57 Magazines dissected ***added more pictures***

Post by panzermk2 » 09 Jul 2014, 13:10

WOW in the past they would not. But then in the past they refused to acknowledge a problem.

I have about 20 sitting around with cracked feed lips I have not bothered to fix or throw out.

Who did you talk too?
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Re: FN 57 Magazines dissected ***added more pictures***

Post by FNGuy » 12 Aug 2014, 11:06

bruteandbear1 wrote:Thats funny all three of my magazines are the new style. I just got my mk2 about a month ago so maybe there stockpile ran out.
X3. Just got a new Mk2 and all 3 mags were the new style. :)

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Re: FN 57 Magazines dissected ***added more pictures***

Post by PursuitSS » 06 Feb 2015, 20:23

I just took delivery of a new 5.7 and it came with one new style and two old style mags.

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Re: FN 57 Magazines dissected ***added more pictures***

Post by FNewbie » 21 Jun 2017, 17:30

Really helpful thanks!

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Re: FN 57 Magazines dissected ***added more pictures***

Post by FNewbie » 21 Jun 2017, 17:57

I would like to share a brand new clip i received from cheaperthandirt for my MKii. it's suppose to be an OEM, this clip looks different from all the ones posted and i also wanted to get some input on the space between the clip and the handle along with the separation down the middle when looking down the clip.
Thanks again!
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Re: FN 57 Magazines dissected ***added more pictures***

Post by PursuitSS » 21 Jun 2017, 18:44

Its the new style factory FN magazine

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Re: FN 57 Magazines dissected ***added more pictures***

Post by FNewbie » 21 Jun 2017, 18:51

PursuitSS wrote:
21 Jun 2017, 18:44
Its the new style factory FN magazine
I assume all clips fit all FN gens?

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Re: FN 57 Magazines dissected ***added more pictures***

Post by blueorison » 21 Jun 2017, 22:03

FNewbie wrote:
21 Jun 2017, 18:51
PursuitSS wrote:
21 Jun 2017, 18:44
Its the new style factory FN magazine
I assume all clips fit all FN gens?
No clips fit into the FsN platform, of any iteration.

But this magazine will work in all the ones that you will encounter.
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Re: FN 57 Magazines dissected ***added more pictures***

Post by FNewbie » 22 Jun 2017, 00:02

blueorison wrote:
21 Jun 2017, 22:03
FNewbie wrote:
21 Jun 2017, 18:51
PursuitSS wrote:
21 Jun 2017, 18:44
Its the new style factory FN magazine
I assume all clips fit all FN gens?
No clips fit into the FsN platform, of any iteration.

But this magazine will work in all the ones that you will encounter.
TY sir! :) all i needed to know i was a bit worried this was for an older gen or something.

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Re: FN 57 Magazines dissected ***added more pictures***

Post by Captiva » 27 Apr 2018, 13:41

Airdog wrote:
19 May 2012, 14:00
NEW MAGAZINE DESIGN AS OF LATE APRIL 2012.
FN has added a full length vertical rib inside the front of the magazine.


Arrows showing rib in the front of the magazine. Bottom of mag with bottom plate removed (left).
Image

Image

Image

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Re: FN 57 Magazines dissected ***added more pictures***

Post by panzermk2 » 30 Apr 2018, 10:16

What picks do you need? I can reload them
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Re: FN 57 Magazines dissected ***added more pictures***

Post by panzermk2 » 30 Apr 2018, 10:17

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Re: FN 57 Magazines dissected ***added more pictures***

Post by 5Jeffro7 » 06 Feb 2019, 18:54

truth be told, I've not browsed the entire thread, but I'd like to add a little information that I just encountered:
yesterday, I picked up a MKII & the magazines that were included with it (20's) did NOT have the metal pin in them: I'm assuming this is one of the features of the so-called "new" style magazines?

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Re: FN 57 Magazines dissected ***added more pictures***

Post by panzermk2 » 08 Feb 2019, 20:57

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Re: FN 57 Magazines dissected ***added more pictures***

Post by snakedoc7 » 14 Feb 2019, 23:54

Great pictures of the comparison.
I wonder if anyone has ever attempted to make an after market mag follower?

I was looking at a orange 5th gen Glock mag the other day and got wondering that. I seen the gray one in the start of the thread but don't recall ever seeing any others.

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