Ultimate Arms Gear Tactical Stealth Black Slip On Rubber Recoil Reducing Combat Buttpad Butt Pad For 6 Six Position Retractable Collapsible Stock AR-15 AR15 M4 Rifle Shotgun Great For Rifles And Shotguns That Are Equipped With Standard 6 Position Stocks Easy Installation - Simply Slips On Stock's Rear 1" Extension : Reduces Recoil And Increases Length Of Pull Classic U.S And Arsenal Bomb Emblem Material : Non Slip Rubber, Color : Black, Weight: 4oz