The hatfield sas 20 is a semi-automatic 20 ga.Shotgun featuring a walnut buttstock and forend with deluxe checkering and a recoil absorbing 0.5" ventilated rubber recoil pad.The sas operating system is a unique blend of gas and inertia, where a gas piston moves only one inch to kick the bolt rearward and start the bolts inertia travel through the operating cycle; fewer moving parts provides higher dependability.The sas gas/inertia system operates dependably with most commercially available 2.75" and 3" shells.The gas/inertia action is housed inside a receiver machined from 7075 aluminum finished in a high gloss black anodizing.The sas 28" barrel is chambered for both 2.75" and 3" shells and features a full length ventilated rib and screw-in chokes; three chokes (f, mod, ic) are included.The barrel finish is high gloss black chrome to match the receiver.Magazine capacity is 4+1 rounds, but with a magazine plug included to limit the capacity to 2+1 rounds.Total weight is approximately 7 lbs.Stock Description: FixedAction: Semi-AutoGauge: 20 GaugeBarrel Length: 28"Capacity: 4+1Chamber: 3"Oal: 48"Weight: 7 lbsReceiver Description: SteelChokes Included: F,M,ICBarrel Description: Vent Rib Black ChromeSights: HiViz Fiber Optic FrontSafety: CrossboltBarrel Length Range: 28" to 28.99"Weight Range: 7 lbs to 7.99 lbsHand: RightStock Finish Group: BrownMetal Finish Group: Blued/Black