MWG IK-520 ’40-Rounder’ 40-Round Steel-Reinforced Polymer AR-15 Rifle Magazine (5.56mm/.223 Rem.) Lookin’ Good: Initial DR Range Report!

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By David Crane
defrev (at) gmail (dot) com

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September 3, 2013
Last updated on 10/06/13.

DefenseReview (DR) contributor Jeff Gurwitch has been running the Bulgarian-made MWG IK-520 40-Round Steel Reinforced Polymer AR-15 Magazine (5.56mmx45mm NATO) at the range for a few days on both semi-auto and full auto, and is really impressed with it, so far. "I was doing 40-round mag dumps on full-auto and couldn't make it jam," Gurwitch said. Gurwitch told DR that he has approximately 500-700 rounds through 3 mags (approx. 300-400 rounds the first day, and 200-300 rounds the second day).

Not only was Gurwitch doing full-auto mag dumps with the MWG IK-520 40-Round Mag, he was doing it with a VERY fast running SureFire-suppressed MK-18 MOD 1/CQBR 10.3"-barreled direct-gas-impingement (DGI) tactical AR SBR (Short Barreled Rifle)/sub-carbine WITHOUT his Ferfrans Specialties DSAS/RRS BCG (Delayed Sear Activation System/Rate Reduction System Bolt Carrier Group) installed in it. In other words, that MWG 40-round mag had to keep up with an extremely fast bolt carrier. He says about 30% of his shooting was full-auto with the MK-18.

The other 70% of shooting was conducted with two piston AR's, specifically with two semi-auto-only Adams Arms short-stroke gas piston/op-rod guns with 14.5" and 16" barrels, respectively.

And, the kicker is that you can load the MWG 40-rounder with (MILSPEC) military stripper clips and a C-MAG LCMS10 Speed Loader, no problem. The MWG IK-520 is the first 40-round mag Gurwitch has been able to load this way.

Gurwitch is a competitive 3-Gun shooter, including tactical 3-Gun, so he may end up using the MWG IK-520 40-Rounder for competition.

With only 700 rounds at most through the MWG MWG IK-520 40-Round Steel-Reinforced Polymer AR-15 Magazine so far, Defense Review can't yet say it's the best 40-rounder ever, but if it keeps performing as it has, it may just be. I guess we'll see. While the magazine is looking GTG (Good To Go), DR would like to put at least a few thousand rounds through it and see some extreme temperature testing before we officially sign off on it. So, let's just say, so far, so good. It's lookin' five-by-five, and tickin' like a Timex. 

Looks like the MWG 40-Rounder's a runner.

Company Contact Info:

MWG Company
10665 S.W. 185 Terrace
Miami, FL 33157
Toll Free: 866-307-1466
Office: 305-232-7344
Fax: 305-232-1247

© Copyright 2013 All rights reserved. This material may not be published, broadcast, rewritten or redistributed without receiving permission and providing proper credit and appropriate links.

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MWG IK-520 ’40-Rounder’ 40-Round Steel-Reinforced Polymer AR-15 Rifle Magazine (5.56mm/.223 Rem.) Lookin’ Good: Initial DR Range Report! by

About David Crane

David Crane started publishing online in 2001. Since that time, governments, military organizations, Special Operators (i.e. professional trigger pullers), agencies, and civilian tactical shooters the world over have come to depend on Defense Review as the authoritative source of news and information on "the latest and greatest" in the field of military defense and tactical technology and hardware, including tactical firearms, ammunition, equipment, gear, and training.

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