JMAC's BDS Blast Diversion Shield was co-developed with JMAC's RRD-2C X series of muzzle brakes with external threads. This blast shield threads over JMAC's 2C X and diverts the blast forward, reducing side blast/concussion. In addition to threading over the RRD-2C X, the BDS can also be used with a wide range of suppressor adapters/mounts. Blast shield does NOT include any mounts! Mfg: Jmac Customs