Product Description The Advanced Armament Corp (AAC) 90-Tooth Ratchet Taper Muzzle Brake is purpose-built for use with the SR-7 and SR-5 suppressor lines. Machined from high-strength aerospace steel alloy and coated in AAC&';s hard, durable, corrosion-resistant SCARmor finish, this muzzle brake is engineered to perform reliably in the most demanding field conditions. Designed for 7.62mm/.308 Win caliber rifles with a 5/8x24 thread pitch, the 90-tooth taper interface delivers fast, repeatable, and secure Quick Detach suppressor mounting. Rocksett and a shim kit are included for a precise, secure installation. This brake is exclusively compatible with the SR Series and is not designed for use with older Spring Mount (18-Tooth) or Ratchet Mount (51-Tooth) suppressors. Product Highlights 90-Tooth Quick Detach Ratchet Taper Mount for fast and secure suppressor attachment with SR-7 and SR-5 suppressors Machined from high-strength aerospace steel alloy for exceptional durability and long-term reliability Hard SCARmor finish delivers superior corrosion resistance and a sleek matte black appearance 5/8x24 thread pitch designed for 7.62mm/.308 Win caliber rifles Includes Rocksett and shim kit for precise, secure installation right out of the box Specs Brand: Advanced Armament Corp Caliber: 7.62mm / .308 Win (7.62 x 51mm) Thread Pitch: 5/8x24 Mount Type: 90-Tooth Ratchet Taper Compatibility: SR Series Only (SR-7 and SR-5); NOT compatible with 18-Tooth Spring Mount or 51-Tooth Ratchet Mount suppressors Finish: SCARmor (Black) Material: High-Strength Aerospace Steel Alloy Includes: Rocksett and Shim Kit MPN: 64243 UPC: 850036491125 Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product&';s manufacturer.