Thread-on muzzle devices give the tactical rifle shooter a variety of options for recoil reduction. Precision CNC machined to exact tolerances from high-quality stainless steel alloy that withstands extreme heat and gas particle erosion, even after thousands of rounds. Stands up to the intense tempo of combat conditions without loss of performance. Substantially reduces muzzle rise and provides outstanding felt recoil reduction for better shot follow-through, improved accuracy, and faster follow-up shots. Advanced Impulse Diffusion(TM) technology diffuses muzzle blast to the sides, virtually eliminating gas dispersion back to the shooter and minimizing felt concussion to help keep Mfg: Surefire SPECS: Heat-treated stainless steel, matte black finish. Fits rifles with threaded muzzles only. Crush washer set, tube of Rocksett heat-resistant thread locker, and complete instructions included. Stainless steel construction, matte black Ionbond DLC coating. Available in 5/8-24.