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GSL’s signature 5.56 Bi-Lock Muzzle Brake is threaded with 1/2×28 for your rifle.
Need a wrench to tighten this down?
We don’t stock/carry them, but you can find one HERE
1/2×28 Muzzle Break (223/5.56)
Blast Buster BLA100
1/2×28 Flash Hider (223/5.56) FHA122
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