This new Century Arms BP12 12 ga semi auto shotgun comes with one 5 round magazine, 20" barrel with 4 choke options, dual pistons for heavy and light load adjustments ,and adjustable pop up sights. Insured shipping is $45.00 to the continental U.S. and no card fees added at Deals on Guns. Century website; The Century Arms Centurion BP-12 Shotgun delivers superior performance and consistency in a reliable and durable semi-automatic Bullpup shotgun platform. The BP-12 is chambered in 12 gauge with a 3-inch chamber and 20-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.