An actuator assembly is provided. The actuator assembly includes housing configured for operable engagement by a user, a trigger assembly operably supported on the housing, a gas cartridge releasably secured to the housing, a valve assembly mounted within the housing for controlling the flow of pressurized gas through the housing and a cylinder actuator operably operably connected to the valve assembly. The cylinder actuator includes a piston selectively extendable therefrom configured for depressing a plunger. The piston includes a head having an inlet surface disposed within an inlet chamber of the cylinder actuator and an outlet surface disposed within the outlet chamber of the cylinder actuator. The exposed surface area of the first surface is equal to the exposed surface of the second surface.