Army research a mini assault rifle

[Fess]

Nothing is free. Muzzle flash and recoil are going to be much more pronounced and the squeeze will get shot out long before the bore goes south. Yes, they could be suppressed, but with a barrel that short and that much powder, I suspect they will need a suppressor that much larger.

Naw, it just means that there won't be any need to carry flash-bangs!