The sx4 is built on the bulletproof active valve system that was the core foundation of the sx3.Building on that solid operating mechanism and improving the balance, controls, and internal operating components of the sx4 to make it a worthy successor to the sx3.Stock Description: FixedAction: Semi-AutoGauge: 12 GaugeBarrel Length: 26"Capacity: 4+1Chamber: 3"Oal: 47"Weight: 7 lbsChoke Configuration: Invector-Plus FlushReceiver Description: Realtree Timber AluminumChokes Included: F,M,ICBarrel Description: Vent RibSights: Fiber Optic FrontSafety: CrossboltBarrel Length Range: 26" to 26.99"Weight Range: 7 lbs to 7.99 lbsHand: RightStock Finish Group: Natural CamouflageMetal Finish Group: Natural Camouflage