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Rook Muzzle Brake - 5.56 (1/2 x 28TPI)

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The 5.56/.223 Unique-ARs Rook Brake is made of 4140 Steel and has a Black Oxide finish for a long service life.  Weight 4.2 oz, Length 2.6″, 0.942″ widest diameter.  Thread pitch 1/2″ x 28 tpi.