The Beretta Model 93R is a selective-fire machine pistol based on its popular semi-auto sibling, the Beretta Model 92. It was requested by the Security Commission of Italy during the 70's as a weapon built to fight against the increase of world terrorism at that time. The 'R' stands for 'Raffica' which means burst in Italian.
A selector switch on the left-rear side of the slide allows automatic fire at about 1100 rounds per minute in three-round bursts for each pull of the trigger, or standard single-fire.
Unlike the Beretta 92, the trigger action of the 93R is only single-action. This is because the double-action mechanism on the 92 design had to be removed to accommodate the automatic burst mechanism.
There is a fold down grip in front of the trigger guard and an extendable steel shoulder stock which can be attached to the rear of the butt. The basic design is that of the Beretta Model 92 but with a reinforced slide and extended barrel with a muzzle brake. The 20-round magazine extends some distance below the bottom of the butt.