ULTRADYNE Athena Linear Compensator 350 Legend Black Nitride 416 Stainless Steel 1/2"X28 tpi Made In The USA, The Athena Is Ultradyne's Linear Compensator. It gives a Cleaner Appearance For a Sleek Look compared To Traditional brakes And Is The Most Cost-Effective Way To Upgrade a Rifle To The Dynamount Sighting System. Muzzle Rise Has Been Optimized, With Gas vented at An Angle then Forward. This Sends a Lower Percent Of Sound And gasses Back Towards The Shooter, optimizing Sonic Performance Over Recoil. A Timing Nut Is Included For Easy Installation. Model: Athena Material: 416 Stainless Steel Thread Pattern: 1/2"-28 tpi Finish: Black Nitride