Odin Works Atlas 5, Muzzle Brake, 223REM/556NATO, 1/2-28 Threaded, Stainless Steel MB-ATLAS-5 When it comes to muzzle devices" ODIN Works brings true innovation with the ATLAS Compensator family. The ATLAS features a 3-piece modular design that makes installation simple and fast. The core and the cap are machined from 416R stainless steel and black nitrided while the sleeve is made from titanium. Timing and tuning is done with the titanium sleeve" no shims or crush washers needed.