The bpx 902 shotgun is gas operated and features 18.50" with 3 chokes.I also has a bullpup stock, folding front & rear sights, sling swivel, and comes with two 5-round and one 2-round magazines.Action: Semi-AutoGauge: 12 GaugeBarrel Length: 18.50"Capacity: 2+1Weight: 8.10 lbsStock Description: Fixed BullpupSights: Flip Up Front & RearChokes Included: 3Barrel Length Range: 18" to 18.99"Weight Range: 8 lbs to 8.99 lbsHand: RightStock Finish Group: BlackMetal Finish Group: Blued/Black