Gemtech 13816 5.56 ETM Muzzle Brake 1/2-285. 56 ETM Muzzle Brake unmatched reliability in alignment with ETM equipped suppressors. This muzzle brake is 2. 375" long, pre dimpled for pin and weld to 14. 5" barrel. Virtually eliminates the possibility of carbon locking with a suppressor attached.
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