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PN 1002-SS: 5.56/6.5mm/6.8mm/.30cal Muzzle Brake
For use with M4 and M16-type weapons (1/2” X 28 TPI, .860” OD). Made from 8620 steel with 60RC surface hardness and salt bath nitrited, corrosion-resistant finish. Compatible with SEI Windtalker DC sound suppressor. Jam nut included.