Magnetospeed Large Brake Adapter For V3 Chronograph. 7" in length and barrel diameters up to 1.6" at the muzzle.This product was designed to compensate for the longer muzzle brakes commonly found on large caliber rifles such as the .338 and .50 BMG.The Large Brake Adapter is a milled 6061 aluminum fixture that uses the included V3 Rail Adapter to clamp onto your weapon's barrel for easy use with your V3 Chronograph's bayonet.MagnetoSpeed V3 Chronograph not included Specifications for Magnetospeed Large Brake Adapter For V3 Chronograph: Manufacturer: MagnetoSpeed Fabric/Material: Polymer Package Contents: Magnetospeed Large Brake Adapter For V3 Chronograph The Magnetospeed Large Brake Adapter For V3 Chronograph is a quality addition to the MagnetoSpeed lineup. For more great deals on Chronographs & Shot Timers by MagnetoSpeed please browse our MagnetoSpeed Shooting Accessories page. Magnetospeed Large Brake Adapter For V3 Chronograph