Product Description The Advanced Armament Company (AAC) BlackOut Muzzle Brake 51T is a precision-engineered muzzle device built for 30 caliber (7.62mm) firearms with a 5/8"-24 TPI barrel thread. Fully compatible with AAC 51T sound suppressors, this muzzle brake allows shooters to transition seamlessly between standalone muzzle brake operation and suppressed fire without tools or adapters. Machined from high-strength aerospace-grade steel alloy and finished in AAC&';s proprietary SCARmor coating, it delivers exceptional hardness, corrosion resistance, and long-lasting durability under demanding shooting conditions. Each unit ships with Rocksett and a shim kit to ensure a secure and properly timed installation. Product Highlights Fully compatible with AAC 51T sound suppressors for fast, tool-free suppressor attachment Machined from high-strength aerospace steel alloy for maximum strength and reliability SCARmor finish provides a hard, durable, and corrosion-resistant black surface Designed for 30 caliber / 7.62mm firearms threaded at 5/8"-24 TPI Includes Rocksett and shim kit for precise, secure timing and installation Specs Brand: Advanced Armament Company (AAC) MPN: 64178 UPC: 850036491118 Caliber: 30 Cal / 7.62mm Thread Pitch: 5/8"-24 TPI Material: High-strength aerospace steel alloy Finish: SCARmor (Black) Suppressor Compatibility: AAC 51T Suppressors Includes: Rocksett and shim kit Condition: New 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. ]]>