Developments at Fabryka Broni: 7.62×39 MSBS, domestically made magazines

The Polish magazine Bron Amunicia TAC has recently made light of Fabryka Broni releasing both a 7.62x39mm version of the MSBS at the International Defense Industry Exhibition MSPO in Poland, and a STANAG compatible 5.56x45mm magazine (separate from the exhibition). Having a 7.62x39mm model or conversion has always been of interest since the early 2000s among a number of firearms manufacturers. It originates from a civilian market that wants to make use of the 7.62x39mm round in firearms other than the AK, in addition to a number of military groups that see potential in the round being used for a battlefield pick up, or allowing the ability of forces to convert their existing battle rifles to fire the enemies ammunition. Of course, this scenario is really only forceable with SF types that encounter enemy munitions, and not your line companies that would probably only be around significant enemy ammunition during a siege or similar situation.


However, the more important consideration with 7.62x39mm is that the current Polish military rifle, the Beryl, is an AK design chambered in 7.62x39mm. Thus, if the MSBS is going to be competitive in the future, if the Polish military doesn’t want to change over to the 5.56x45mm round (which the MSBS is currently chambered in), then this would open up the competition to the 7.62x39mm.

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The polymer STANAG magazine appears to come in two versions, one 30 round version with cartridge windows (at 20 and 30 round marks) and another 10 round version without cartridge windows. At this point in time the only images we have at hand seem to be graphic design images and not tangible production items. Although the article states that the magazines were produced because Fabryka Broni wanted a domestic supply of magazines, I would like to venture otherwise. The 30 round magazine can incorporate a cartridge limiter, similar to how many CA magazines are being made. In addition to the 10 round magazine, I assume that these magazines are actually being made for the U.S. market. Fabryka Broni could just as easily produce aluminum magazines for their own military and LE markets, so why even bother with a polymer 10 round magazine and limiter for the 30 round, that would be perfect for civilian import? Another explanation is for the parade purpose of the magazine. Recent pictures have showed some Polish military units parading with 10 round magazines inserted, probably loaded with blanks or not loaded at all.

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Thank you to Piotr P. and Hecheyra H. for contributing to this post!


Infantry Marine, based in the Midwest. Specifically interested in small arms history, development, and usage within the MENA region and Central Asia. To that end, I run Silah Report, a website dedicated to analyzing small arms history and news out of MENA and Central Asia.

Please feel free to get in touch with me about something I can add to a post, an error I’ve made, or if you just want to talk guns. I can be reached at


  • Marcin Ski

    Polish Army Beryl is 5,56×45 caliber. on picture you have posted there is civilian Beryl chambered 7,62×39 (characteristic magazin curve) next to prototype MSBS in 7,62×39.

    • Tritro29

      Beryl.Archer to be precise.

    • Chris22lr

      I think that Beryl on picture is actually military (select-fire) Beryl M762 as sold to Nigeria.

      FBR announced that they want to make some civilian 7.62 Beryls but they said that it would happen in 2017. Soon after that MoD made big order on 5.56 Beryls for Polish Army, and supposedly this will consume all FBR work force until 2019. This may put civilian M762 on a backburner. Or not (most civilian Beryls, excluding export variants, were offshots of some military contract).

  • Tim Candia

    The beryl is chambered in 5.56. Although they do make it and have sold some 7.62×39 beryls to african countries. But when speaking of the beryl, that is a 5.56 ak

    • john huscio

      Pistol looks like an arex with more slide cuts and stippling

      • FORMOZA

        Not really, PR-15 is deep modernisation of MAG95 pistol developed by FB back in 90’s.

        • Tritro29

          Very nice pistols the 95’s. Awkward, but nice.

        • mikewest007

          So what happened, that CZ-based new pistol got canned?

          • FORMOZA

            U mean that fugly polymer thing? Canned or even canceled.

          • mikewest007

            Oh, something like that crazy-ass space bullpup sniper rifle I heard couldn’t even be gripped properly because the pistol grip was so chunky nobody couldn’t put their fingers around it?
            Also, don’t call it fugly, at least it didn’t look like a commie-era reject…

  • Scorpy

    As mentioned by others, the Beryl is 5.56, with models in the Soviet calibers also available. Hell, even it’s predecessor, the Tantal, was 5.45×39, not 7.62×39.

    Also, ugh, 7.62×39 STANAG magwell magazine. I still think they’re impractical and ugly as hell. And the Beryl uses a polymer magazine, Tantals had steel I’d guess, so why would they go with aluminium magazines now?

    • Freefall

      Yeah, great idea with that standard AK mag for 7.62×39 MSBS… AK’s (and Beryl’s) manual of arms is a dream – especially when braking contact at night. Try it and compare to working on AR platform. These new C-Products mags are working well – guess what SIG used for the MCX? And I agree, they are ugly as hell (I’ve put Magpul Ranger plates on all mine – improves the ergonomics a lot and aesthetics a little). If you want a modern rifle you need to feed it from a modern mag – otherwise you might as well just stick to an AK.

      Tantal’s mags were polymer and steel. They are using aluminum mags extensively because they are the most reliable in the dust tests and cheap. Not the best ergonomics in bullpup layout though.

  • mig1nc

    Eastern Europe is doing interesting things these days. Very cool to see the MSBS as evolving similarly to the ACR whereas the Bren 806 has evolved like the FN SCAR and incorporated some aspects of the FN AC.

  • Chris22lr

    Boys, don’t get your hopes too high!

    As of September 2016 MSBS is not yet happening. Basic 5.56 rifle is still undergoing military tests. FBR won’t sell this rifle until it’ll pass the tests – reason one is that tests showed some flaws in the design and rifle is getting refinements, and reason two is that it’s easier to sell Polish MoD-approved MSBS to any other military/LE customer (nobody can tell them “back off, it’s untested gimmick!”).

    However even passing the tests doesn’t mean that we can posts all these “it’s happening!” memes. Weapon was actually designed by Polish Military Institute of Technology, with FBR as one of subcontractors. Polish MoD owns any rights to the design and they can (and probably will) block any sales of their newest toy (be it for military market or civilian). And even if they won’t put MSBS in a cooler, MoD ordered a huge numbers of 5.56 Beryls for Polish Army which makes FBR busy up to 2019.

    US civilian market is even weirder thing. FBR put quite an effort into making it’s Texas branch, but since ATF denied importation of their guns, apparently the whole thing lost it’s priority.

    As for the 7.62×39 MSBS – the only similiar gun that was met with enthusiasm of military customers was Beretta ARX. Why? Because it used AK mag, not some proprietary design. Hopefully FBR will have it fixed when MSBS finally could be sold.

    • mikewest007

      Considering that the current MoD is a complete moron or worse, I could expect him to block any civilian and foreign sales as soon as his paranoia (or, worse, handler) tells him that Russians will buy one to reverse-engineer it and design some supervillain weapon that will render all the MSBS rifles inoperative.

  • Polishsoldier

    Polish Army changed to 5,56 with Beryl rifle. Beryl is in 5,56.
    FB sold 7,62 Beryls to Nigeria.
    You don’t have clue what you writing about.

  • BrandonAKsALot

    Two seconds on google would have told you that Poland ditched the soviet calibers a while back. Like every other country that adopted the 5.45×39, as they did with the WZ-88, they dropped it quickly, largely because it’s apparently expensive to license and then switched to 5.56 NATO.

  • iksnilol

    Uh… no AK lower?

    COME ON! Seriously!?… please?

  • Tritro29

    That’s how it’s exported in Russia though.