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Steel 1/2x28 AR-15 muzzle device. The 1/2x28 thread is the standard .223 / 5.56 AR-15 muzzle pitch. Wrench flats are provided for installation.
Features:
Verify your barrel is threaded 1/2x28 before ordering — this is not 9mm or .30-caliber pitch. A crush or timing washer is required to time the device and may not be included.