The SI Sail Comp is a high efficiency single chamber brake. The Sail comp derives its name from the unique baffle shape that redirects muzzle gasses out and upward providing recoil mitigation and muzzle rise control. The Sail Comp packs the performance of larger, heavier devices into a compact, lightweight package. Features: a Swept baffle shape captures and redirects muzzle gas for improved muzzle control a Compact high efficiency single baffle design a For 5.56/.223 1/2x28 thread