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AAC Muzzle Brake 90T Taper for 7.62mm with 5/8-24 threads, SR Series Only. Machined from high strength aerospace steel alloy and finished in SCARmor. Designed for use with the SR-7 and SR-5 suppressor lines. Not compatible with older spring mount (18-Tooth) or ratchet mount (51-Tooth) sound suppressors.
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