While technically it’s a long gun, it is anything but

[Thor]

A3 Tactical Triad bullpup chassis, milspec SBR AR lower, 300blk FM15 bufferless upper.

30 cal in a package smaller than a P90. It’s just silly. Comparison shows a 4.5 inch AR pistol, and an 11.5 inch SBR.

 

[Drcrimson]

That’s definitely and interesting variant. I generally haven’t been a bullpup fan but I might try that one.