Rearden MFG R2C HT Flash Hider 1/2-28 Heat Treat. Always use an alignment rod to ensure that the entire system is set up correctly. Make sure all surfaces are cleaned and the muzzle device has been torqued and Rockset to the barrel. Torque the muzzle device to approximately 30 ft lbs. Make sure the muzzle device is square against the shoulder. When setting the silencer on the muzzle device ensure that the threads and tapers are clean. Torque the suppressor to 10 ft lbs. Ensure alignment. Enjoy. Specifications for Rearden MFG R2C HT Flash Hider: Manufacturer: Rearden MFG Color: Heat Treat Features of Rearden MFG R2C HT Muzzle Device Atlas and Atlas XL compatible Plan B compatible H900 Wheat Finish (Variations exist) Package Contents: Rearden MFG R2C HT Muzzle Device Shims Rearden MFG 10119: R2C HT Flash Hider 1/2-28 Heat Treat