The AKSA Arms S4 Black semi-auto 12 gauge is a dual gas piston operated shotgun. It comes standard with an oversized bolt release and oversized charging handle for competition shooting. The charging handle is ambidextrous and can be installed on the left- or right-hand side of the receiver. This shotgun features Walnut stocks, picatinny rails, fixed sights with a rear ghost ring, and one of the most reliable actions ever made.