Product Description The Advanced Armament Corp (AAC) BlackOut Muzzle Brake is a precision-engineered muzzle device designed specifically for 7.62mm/.308 caliber rifles. Built to pair seamlessly with the AAC Mk13-SD 90T sound suppressor, this muzzle brake features a 1/2x28 thread pitch and is machined from high-strength aerospace steel alloy for maximum durability and reliability. The hard, corrosion-resistant SCARmor finish in black ensures long-lasting protection even in demanding environments. A Rocksett adhesive and shim kit are included for proper, secure installation right out of the box. Product Highlights Designed exclusively for use with the AAC Mk13-SD / 300-SD 90T sound suppressor for reliable suppressor mounting Machined from high-strength aerospace steel alloy for superior durability and long service life SCARmor finish delivers hard, corrosion-resistant protection in a sleek black color 1/2x28 thread pitch compatible with standard 7.62mm / .308 caliber rifle barrels Includes Rocksett and shim kit for secure, professional-grade installation Specs Brand: Advanced Armament Corp (AAC) Model: MK13-SD BlackOut Muzzle Brake Caliber: 7.62mm / .308 / 762NATO Thread Pitch: 1/2x28 Material: High-Strength Aerospace Steel Alloy Finish: SCARmor (Black) Compatible Suppressor: AAC Mk13-SD / 300-SD (90T) only Includes: Rocksett and Shim Kit UPC: 850036491651 MPN: 65017 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.