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

Posted: 13 Sep 2009, 19:43
by Esteves
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***

Posted: 13 Sep 2009, 21:08
by Augustus
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.

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

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

Posted: 14 Sep 2009, 09:50
by DAUG
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.

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

Posted: 14 Sep 2009, 09:59
by DarkWater
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 :-)

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

Posted: 01 Nov 2009, 11:30
by lazi
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:

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

Posted: 01 Nov 2009, 11:58
by panzermk2
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***

Posted: 01 Nov 2009, 14:57
by fatherfoof
You are a talented photographer. :thumb:

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

Posted: 08 Nov 2009, 19:39
by Buffman
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?

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

Posted: 08 Nov 2009, 21:04
by blueorison
ew promags ewwwww

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

Vote Republican.

:laugh:

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

Posted: 11 Nov 2009, 16:29
by SeaHawkDriver-B
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.

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

Posted: 09 Jul 2010, 19:39
by Outlaw54
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

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

Posted: 17 Apr 2011, 10:27
by variable
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.

V
OUT

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

Posted: 02 May 2011, 18:21
by jsedwards25
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!

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

Posted: 02 May 2011, 19:16
by ynoty3k
Holy zombie thread batman!

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

Posted: 02 May 2011, 20:36
by blueorison
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.

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

Posted: 20 Jul 2011, 21:04
by american lockpicker
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?

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

Posted: 15 Aug 2011, 02:45
by jaker123
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!!!

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

Posted: 07 Sep 2011, 15:33
by Valorius
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. :)

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

Posted: 07 Sep 2011, 16:05
by blueorison
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.

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

Posted: 07 Sep 2011, 16:41
by Valorius
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?