More effective than a trigger lock, this five-gun, key-and-lock system fits and secures the breech of your 12-gauge shotgun, making it impossible to insert or chamber a shell. Fits nearly all 12-gauge Winchester® shotguns, and 12-gauge Remington® and Mossberg® pump shotguns. Low-profile design will not hamper gun-case storage. High-visibility orange for safety recognition. CA DOJ approved.