A training magazine has a body configured to be removably received in the magazine well, a motor connected to the body and operable to generate a motive force, an energy storage element operably connected to the motor and configured to store potential energy generated by the motive force, and an actuator operably engaged to the energy storage element and to the reciprocating action element, and operable to transmit the potential energy to reciprocate the action element. The reciprocating element may be a pistol slide. The energy storage element may be a spring. The spring may be a torsion coil spring having a cylindrical shape with opposed circular ends. There may be an input rotor operably connected to the motor and to a first end of the spring. There may be an output rotor connected to an output end of the spring and to the actuator.