AAC MUZZLE BRAKE – 90T TAPER 7.62MM SR-7 5/8-24 AAC MUZZLE BRAKE – 90T TAPER 7.62MM SR-7 5/8-24 SKU: 64243 PREVIOUS SKU: 104034 The NEW AAC 90T Ratchet Taper Muzzle Brake mounts are for the SR-7 and SR-5 suppressor line. All AAC Blackout muzzle brakes are machined from high strength aerospace... MSRP: Was: Now: $179.99 Add to Cart