Inside, you will find a durable gas system that allows for up to 1500 rounds between cleanings, and a host of corrosion-resistant internal parts/finishing (nickel boron-coated gas piston/rings, magazine tube, hammer/sear, shell stop), enlarged/beveled loading port, elongated elevator, and anodized follower for smooth operation.Action: Semi-AutoGauge: 12 GaugeBarrel Length: 30"Capacity: 4+1Chamber: 3"Oal: 47.50"Weight: 7.75 lbsChoke Configuration: BrileyChokes Included: Briley Extended SetBarrel Description: Vent RibSights: HiViz CompSight Fiber OpticSafety: TangBarrel Length Range: 30" to 30.99"Weight Range: 7 lbs to 7.99 lbsHand: Right HandStock Finish Group: Black