Precision Armament Hypertap Muzzle Brake is a tunable muzzle brake designed to provide recoil reduction with adjustable gas biasing. It is machined from 17-4 stainless steel for a lightweight, compact design. It features integrated timing nut and a Hybrid Baffle Design for fully tunable gas biasing. Includes two stainless spanner wrenches. Specifications: Caliber 7.62x51mm NATO; Inner Diameter 1.09 in; Length 2.94 in; Weight 4.9 oz; Material 17-4 stainless steel; Finish Matte Stainless; Country of Origin USA; Included Accessories: Spanner Wrenches. Works with standard AR-10/AR-15 muzzle threads (variant-specific).