ROBOCOP USED MANY DIFFERENT WEAPONS IN THE MOVIES, HERE IS A LIST OF THE ONES HE NOTICEABLY USED
Auto-9
RoboCop's primary weapon; it is (presumably) a 9mm handgun with a large barrel extension that fires in three-round bursts. The gun remains stored in a mechanical holster which deploys from Robocop's right leg. The prop for the weapon is a modified Beretta 93R. Though unnamed in the films, the script referenced the Auto-9 by name and it subsequently made it into promotional materials including action figures. Some Japanese airsoft manufacturers have made BB gun replicas. It was also modified to not fire unless Robocop is the one using it.
Cobra Assault Cannon
The Cobra Assault Cannon used in RoboCop could fire explosive rounds equivalent to that of a grenade launcher and is based on theBarrett M82A1 sniper rifle. The version used in RoboCop 2 has a smaller build and fires smaller explosive rounds. This version uses the.50 BMG Pauza P-50 rifle.
Machine gun/rocket launcher
This weapon made its appearance in RoboCop 3 and was never referenced by name other than being called a "weapon arm" in promotional action figures, and a "gun arm" by the production team. To use it, RoboCop removes his left hand and replaces it with the weapon assembly. It contains a 9mm machine gun, a flamethrower and a small missile launcher with a projectile potent enough to destroy an armored vehicle.
Flightpack/recharging station
A large jetpack that allows RoboCop to fly. It also doubles as a replenishing system for when RoboCop's battery system is low on power. As seen in RoboCop 3, the jetpack allows Murphy to overcome his relatively limited mobility for tactical advantage in combat. Referred to in the film as a "flightpack" and by production as a "jetpack", some Japanese schematics also mention "Gyropack" as a name.
Mini-gun/cannon
This weapon appears in Frank Miller's RoboCop comic book and was originally meant to be RoboCop's arm cannon prior to the final product in ROBOCOP 3
