The aksa arms s4 wood 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.Gauge: 12 GaugeBarrel Length: 18.50"Capacity: 5+1Chamber: 3"Weight: 8.30 lbsBarrel Length Range: 18" to 18.99"