In this POTD, Marc Krebs, of Krebs Custom Guns, is holding the very first firearm he built back in gun smithing school.  It is the K-84 and it is a 9mm Carbine. “K” is for Krebs and “84” is for 1984 when he built it.


  • randomswede

    This looks like what the M43 is to the RDB but for the SUB-2000. K for Krebs instead of K for Kel-tec of course.

  • Bob

    Has a post WW2 experimental vibe to it. I like.

    • seymour099

      Like the 1950s SIG SG 510 / Stgw 57?

  • De Facto

    See, I would have loved to buy something like this instead of a Sub2000. Nothing against Keltec, I just prefer wood and steel. I like to think I’m not the only one left who prefers old school to the newer plastic fantastic wonders.

    • PK

      Far from it! I use 4140 and exotic hardwoods in my builds, as much as I possibly can. The rare exception is when I’m going for a futuristic, ultra-light oddity, or when milling AR uppers (where I then use 7075T6 and hardwood) or similar designs where steel isn’t already used in major construction.

    • randomswede

      I think most people prefer steel and wood over aluminum and aluminum over plastic. But when you have to pay “extra” or carry the weapon more than you are using the weapon many fold those preferences away.
      Add to that how the materials react to salty belly sweat.

      There’s quite a few companies that make most their money off of people replacing plastic with wood on their weapons. There was even a company that sold stainless steel frames for glocks.

      • Kivaari

        Except, the plastics used in Glocks and good M4s is pretty good stuff. Today, no one should look down at plastic as being cheap junk. Nice blued steel and nice walnut do make nice guns. Like an old M70 Winchester, what’s not to like. That’s a hunting rifle. A combat rifle or pistol needs practical construction.

        • randomswede

          Indeed, largely it a question of the right material for the job.
          Plastics and aluminum have both come a long way, as has steel but it had a head start, where plastic and aluminum for industrial applications has only been around for a century.

          It would be interesting to know how much more accuracy they got out of the H&K G28 when they switched from aluminium to steel for the upper.
          Similarly I know there’s a titanium AR-15 out there but I’d love to see a well engineered chromoly one. Purely for academic purposes, there’s no reason to assume it would have any marketplace value.

    • Tyler McCommon

      I just like proven designs. I almost never buy anything new as if rather not pay top dollars to be a beta tester.

      • Kivaari

        As this article states this was his first gun made in gun smith school. Pretty impressive.

    • Kivaari

      Sub2000s have a certain toy feel and look to them that has kept me from buying one. As much as I would like a similar carbine taking Glock magazines, Kel-Tech just can’t get away from making them toy-like. The Kreb’s K84 is a beautiful carbine.

    • Sianmink

      A wood and steel folding PCC would be pretty sweet.

      • “Ruger American PCC – Takedown edition” coming out 2020 😛

  • PK

    Simple and sleek. Nice! I wonder if he used Sten magazines, it looks like he did, but perhaps it uses a mag he made for himself, as well.

    • Anonymoose

      Kinda has a MAC-10 look to the grip, so it probably takes those.

      • PK

        The M10 mags I have would never fit in that grip, but they’re not the 9x19mm mags. Perhaps the M10/9mm mags don’t have the tabs to either side?

  • OJS

    Ghost gun! Quick, someone call DeLeon!

  • If he offered those for sale – How many of us would buy one?
    *Raises Hand* Me!

    • So would I. Knowing Marc I can say for sure that gun will run like a swiss watch. His AK’s are crazy good stuff!

    • Patrick M.

      Not to mention its ban state compliant!

  • M

    I dont know why but I got reminded of the VZ 23 why I saw it

    • PK

      I thought the same thing. It’s the centered grip/magwell along with that dark grey color. The wood even looks sort of like the Czech bakelite!

  • Harry’s Holsters

    I’d love to shoot it!

  • Southpaw89

    Its like the Hi-Point carbines sexier cousin, I want one.

    • Kivaari

      It doesn’t appear to be CHEAP plastic, CHEAP sheet metal, CHEAP zinc and has style. Why Hi-Point chose to make guns as ugly as they did is just strange. Just think, the HPs made to look like a gun someone would want to own, would increase sales substantially. It wouldn’t cost anymore to make them look better. No one can explain to me why they purposefully made all their guns ugly.

  • Kivaari

    Very nice.

  • toms

    Planet of the apes style, it would be right at home with my hadar II

    • Kivaari

      Those were M1 carbines.

  • All the Raindrops

    …and now he builds his guns on ras47’s…. cmon krebs!

  • It’s like a Mac 11 lower meets STEN upper, in a Berretta Storm footprint. Major want.

  • Cmex

    Any info about the operating mechanism?

    • Kivaari

      It looks like it is straight blow back. Simple and reliable.

  • Wagon_Waifu

    It puts me in mind of the Gyrojet rifles used by the ninjas in “You Only Live Twice”.

  • Old Vet

    I’m sorry, off topic, but that bubble wrap behind him reminds me of a snake skin. Kool gun though.

  • steve

    how scarily insane is it that here in CT, that would be an illegal “assault weapon”? thank God we have politicians here who are wise enough to know to keep these evil weapons of mass destruction out of the hands of gun owners.

  • Zaro27

    Looks kinda like a 1941 Johnson LMG.