GSG-41: Predecessor To The KSG

Back in the 90’s when George Kellgren was leading Grendel Arms, he came up with the idea for a bullpup high capacity pump shotgun. Sound familiar? This is not the KSG we know today. The KSG is a dual magazine tube fed pump shotgun chambered in 12 gauge. The predecessor to that concept was the GSG-41. Or Grendel ShotGun .410. It is a .410 shotgun. According to this image/flyer below, the GSG is fed by a 12 rd selectable column magazine. Not sure what “selectable column” means, but is sounds like the user could load one column with bird shot and the other column with slugs. Similar in concept to the KSG, where the user could choose the next round on demand. Another interesting feature is that they designed it to have an integrated flashlight right above the muzzle. Way ahead of the KRISS Vector or the UTS-15.

Due to the bullpup design, the GSG-41 sported a 24″ bbl. Very impressive for a 26″ OAL gun.



Unfortunately the gun never took off beyond concept and possibly a prototype.

Nicholas C

Co-Founder of KRISSTALK forums, an owner’s support group and all things KRISS Vector related. Nick found his passion through competitive shooting while living in NY. He participates in USPSA and 3Gun. He loves all things that shoots and flashlights. Really really bright flashlights.

Any questions please email him at


  • Matrix3692

    I think it means that either the single box magazine had two separate and independent column, each for one kind of ammunition, or two separate single stack magazine……

    If true, that is one hell of a bulky magazine, even in .410 caliber, and not very weight friendly.

    • Nicholas Chen

      My thoughts exactly.

    • Rusty Shackleford

      I’m wondering if the GSG-41 magazine might be the predecessor to the KelTec PMR30/CMR30 mag.

  • NL

    Isn’t Grendel the “predecessor” company of Kel-Tec, or something? A lot of Kel-Tec pocket pistols, the PMR-30 look like modified Grendel products…

    • Nicholas Chen

      Yes it is.

      • Tassiebush

        Ah that suddenly makes sense that both fielded/field high capacity .22mag pistols!

  • andrey kireev

    Looks extremely Retro-futuristic, like something out of Fallout =P

  • Whiskey Hammer

    Action thoughts:

    Pump-forward action w/ and uzi style over barrel bolt carrier?

    It looks like it says it’s bottom ejecting but I dont see how even a regular extraction and ejection cycle would work, let alone practical bottom ejection.

    And I still have no idea where the hammer and firing pin are. It looks like the assembly behind the magazine might be the hammer but I dint see how it would bridge across the magazine if it is an uzie style bolt carrier. Maybe it’s an articulated hammer that drops into a recess behind the magazine and actually follows the bolt carrier when it’s brought forward into battery?

    • Andrew

      You have it mostly right but there is no bolt, its the barrel that moves. See the russian RMB-93 pump-forward shotgun they probably used as inspiration.

      • Avery

        I noticed this as well. I’m not sure about if any information on the RMB-93 was around then, but the pump-attached barrel is how the NeoStead operates. Which is funny because that’s part of the mechanism that guarantees the NeoStead’s reliability to feed from multiple magazines over kludges that the KSG and the UTS have and one of the the things that’s patented by Neophytou and Truvelo. I don’t think the NeoStead beat anyone to the punch, more likely it was a coincidental evolution.

  • MadKaw69

    A Conventional stocked bullpup? Now that is cool.

  • BryanS

    I wonder how NY would look at a shotgun with a normal stock, and multiple standard capacity magazines. 2×7 is still 14… but fits in their absurd law.

  • Tahoe

    High Standard Model 10. Designed in the 50s, bullpup shotgun, had a built-in flashlight. This one takes it a step further with the magazines, but the Model 10 was 12 ga. (and designed 60 years ago!)

  • Giolli Joker

    Uhm… I don’t think there are many other guns out there where the grip actually puts your firing hand around the barrel.
    Nice design, overall.

  • the ammo addict

    Kel-Tec needs to build this gun right now!

  • Alucard

    I was pretty sure the NeoStead 2000 was the predecessor to the KSG,I mean it is literally the same exact concept,just pumps forward instead of backwards.Also it came out before the KSG and before the Grendel was a blueprint.

  • Wv Cycling

    I’ve always hypothesized it would be sweet to have six tubes tha can rotate to feed a barrel in the center of a semiauto shotgun.

    Unwieldy? Likely.

    36 rounds of 12 gauge? One man army.

  • Tassiebush

    If selectable collumn means dual selectable mags then one of these could be pretty nifty for general outdoorsy carrying to shoot opportunistic game and vermin. At 5lbs, lightweight and being able to choose between loads while still being a repeater it’s extremely convenient and pretty versatile.

  • Tassiebush

    The double action only trigger probably simplies the action a fair bit.