Stop! Or My Mom Will Shoot (1992)
A tough police sergeant's mother comes to visit him, and promptly starts trying to fix up his life, much to his embarrassment. For his birthday she buys him a machine gun out of the back of a van, and begins to further interfere with his job and love life, eventually helping him with a case he's on. police, submachine gun, gunfight, los angeles, california, criminal, buddy cop, 1990s, street shootout