LimbSaver Sharpshooter XRing Barrel Dampener Standard Barrel Black 12051LS A unique barrel dampener the LimbSaver Sharpshooter X-Ring helps to improve your accuracy while also dampening barrel whip. It s available in two options — one for standard barrels and one for bull barrels. The Sharpshooter X-Ring delivers sub minute-of-angle groups even with over the counter ammunition. Made from LimbSaver s proprietary NAVCOM technology (Noise and Vibration Control Material) the Sharpshooter X-Ring tunes the vibration waves that affect shot grouping. Each of these individual waves negatively affects the barrel and the Sharpshooter X-Ring is specifically designed to control them. By reducing this energy and tuning the dampening characteristics to a specific location on the barrel you can consistently control muzzle movement during lock-up time which translates to greater accuracy. Used by a wide range of sportsmen competition shooters military and law enforcement the Sharpshooter X-Ring is durably built to be used outdoors in harsh environments. The standard size model fits barrels with 1/2- to 7/8-inch diameters and the bull barrel size model fits barrels with 3/4- to 1-1/8-inch diameters. The bull barrel model also works on scoped slug shotguns. Using state-of-the-art technologies LimbSaver produces highly effective noise- and vibration-dampening products for archery and firearm products including bow stabilizers recoil pads rifle slings and more. Proudly engineered and hand-made in the USA LimbSaver products are widely used by outdoor enthusiasts military law enforcement and more.