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.

Wollychop
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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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jmz5
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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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Grantness
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Re: FN 57 Magazines dissected

Post by Grantness » 16 Aug 2009, 16:24

:agree: Nice work :thumb:

reads
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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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panzermk2
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Re: FN 57 Magazines dissected

Post by panzermk2 » 16 Aug 2009, 19:57

Nice review! :thumb:
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ynoty3k
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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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f3rr37
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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.

Wollychop
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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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f3rr37
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Re: FN 57 Magazines dissected

Post by f3rr37 » 17 Aug 2009, 08:55

Sticky'd.

mekunic
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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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gw45acp
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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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Captan Harold D
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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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gotants
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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?

ynoty3k
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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!

mekunic
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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.

Captan Harold D
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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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DREWES
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Re: FN 57 Magazines dissected ***added more pictures***

Post by DREWES » 11 Sep 2009, 21:32

Great post!
Thank you....

Augustus
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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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