JMAC Customs recently announced the roll out of their latest muzzle brake the RRD-2C 556 which is based on the original 14x1LH version.
The JMAC Customs RRD-2C 556 muzzle brake is threaded 1/2x28tpi and made specifically for the 5.56 NATO cartridge. JMAC customs also offers an option mounting option of crush washers or shim kits
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