Kexuan 5/8x24 Muzzle Brake for AR-10 LR 308 Black Steel. Black steel muzzle brake/recoil compensator. Jam nut included. High quality Steel construction with CNC machined tech Specifications for Kexuan AR-10 / AR-15 Muzzle Brake: Manufacturer: Kexuan Color: Black Fabric/Material: Stainless Steel Gun Make: AR Platform Package Contents: Kexuan AR-10 / AR-15 Muzzle Brake Jam nut Crush washer What firearm models does the manufacturer say Kexuan AR-10 / AR-15 Muzzle Brake is compatible with? The manufacturer suggests that Kexuan AR-10 / AR-15 Muzzle Brake is compatible with AR-15 AR-10 DPMS LR-308Kexuan MZ-06-02-B: 5/8x24 Muzzle Brake for AR-10 LR 308 Black Steel