PRODUCT DESCRIPTIONSimilar to A2 style brake, the open top slots and closed bottom increase muzzle control and reduce dust signature making it compliant with California Featureless laws. The end is also blocked to reduce recoil. 1/2" x 28 threads .223/ 5.56 compatible. *This device will not reduce or remove flash.* Increases muzzle control* Reduces dust signature* Closed front design reduces recoil* 1/2" x 28 threads* Compatible with .223/5.56 barrels