Sure has been a while...

[Cobalt Blue]

you normally hold a revolver by fully extending your strong arm and grabbing the gun by the grip(to deal with the recoil) and place your free hand on the bottom of the grip to help yourself balance and aim the gun.

you can fire with a single arm, though is way less accurate(like 70% aprox) but doubtfully would fuck your arm(unless firing something with a larger caliber than 9mm)