The Century Arms A4 Shotgun delivers superior performance and consistency with a reliable and durable semi-automatic shotgun platform. A reliable gas piston allows for fast and clean cycling. The A4 is chambered in 12 gauge with a 3 inch chamber and 20 inch barrel, featuring a Ghost Ring rear sight and a fiber optic front sight. A 5+1 round magazine tube. Also a picatinny top rail to attach optics. This model features an all-black cerakote finish.