It's been done.
However you're at a disadvantage in regard to effective range and ammo. Although that just might make you pick your shots and become more crafty when playing.
I played a pistol game before and totally got owned by the guys running TM Mk.23's.
I'd say if you're going to run a pistol only setup go with 4 or 5 mags minimum. Carry them on a modular belt with pistol mag pouches.
ಠ_ಠLess QQ more Pew Pew
READY TO >> RACE