The Advanced Technology Inc. Shotgun System allows users of America's most popular 12 gauge pump shotguns to improve the performance, feel and appearance of their duty guns. With virtually unlimited combinations, the law Enforcement officer can choose the new stock, forend, flashlight or laser mount, shotshell holder and magazine extension that meets his needs. If it is necessary to make the weapon lighter or more comfortable to carry, then the Shotgun System is the perfect solutuion. Overall lenghth, weight and feel of the Officer's shotgun can be changed.