Sorry, but neither. Not much of a fan of the AR platform. Much less in a pistol cartridge do pistol work. And the PS90 is just gawd awful ugly IMO. I won't be seen with something that looks like that. Give me an M1 Carbine (if it must be of a carbine variety) over either anytime. Or a pistol that I trust,and can shoot accurately, at 50 yards, and I'd be all the more happier. I got other rifles for longer range work. (And most DA would love to hear your defense as self defense at 50+ yards. Not sayin' that it's never happened or been justified. Just very unlikely.)
Wyman