The Century Arms Centurion BP-12 Shotgun delivers superior performance and consistency with a reliable and durable semi-automatic bullpup shotgun platform. The BP-12 is chambered in 12 gauge with a 3 inch chamber and 19.75 inch barrel, featuring flip-up sights, a rubber recoil pad, and a 5 round magazine. This model also includes two interchangeable pistons, allowing you to shoot 2-3/4 and 3 shells interchangeably with any ammunition of the proper gauge for your firearm with flawless performance. With proper care and handling, it will give you long, reliable service.