The M3 Convertible is a no-nonsense shotgun that military and police all over the world depend on. This shotgun can be quickly changed from a fast cycling semi-auto for conventional loads to a manual pump action for low energy special purpose loads such as gas, beanbag and rubber bullet loads. For semi-auto action, merely rotate the selector ring 1/4 turn, push the forend forward and release the selector, to switch back to pump action simply reverse the procedure by pulling back after the…