Doesn't fit Ar or Pistol category. Possible design. I don't remember model designation but the bolt and carrier was charged with a trigger inside the hand guard, on top. No charging handle, in back. First version did not have forward assist either but easily was added Shorten the magazine well to handle a 10mm size or other magazine of double stack etc. Modify carrier and buffer for shorter round to save weight and size. Eight or ten inch barrel and effective recoil reducing flash hider or even a short silencer. Semi or full auto. Easily controlled with rear grip and magazine or short hand guard. Can't calculate the weight but it shouldn't be over 40 ounces??? This instead of adopting or already adopted Glocks with weaker 9mm or .40 cal ammo. Actually jack up the pressures to sub machine gun characteristic pressures. What do you think? Still have to have a strap to carry or possibly a loop or pivot on belt like some old western revolvers?