Black AR15 M4 Butt Pad 6 Position Rubber Buttpad Recoil Pads HMB001 Reduces the weapon's felt recoil while adhering the stock to the shoulder for better controllability. Made of non slip rubber material. It is equipped with standard 6 position stocks. Slip-on Sleeve Design with Lip Re-enforcement for a Perfect Fit. Length: 5.5", Width: 1.9", Thickness: 1" , Weight: 3.6 oz.