Yes, a pistol would be cool. Use this brace on it:
https://www.sb-tactical.com/product/sba3/
You could make a 300BLK pistol, and that's awesome and everything. Supersonic or subsonic, you'd have to decide, through a short barrel. It would do both, but are you gonna put a can on it, with subs? Otherwise, make it a Grendel pistol, and rock that thing out to some distances that would blow your mind, on a short gun. No joke.