Product Description The Advanced Armament Corp (AAC) 51T Pingless Flash Hider is a precision-engineered muzzle device built for demanding tactical applications. Designed for 7.62 NATO rifles with a 5/8x24 thread pitch, this flash hider is purpose-built for use on 13.7" and 13.9" barrels and integrates seamlessly with the widely trusted 51T mount system. The Pingless design removes the traditional pin-and-weld requirement, allowing for cleaner installation and easier removal without compromising retention. Coated in AAC&';s battle-proven SCARmor black finish, this device delivers outstanding corrosion and wear resistance in harsh environments. A Polymer Witness Block (PWB) is included to ensure precise alignment during installation. Product Highlights 51T Mount Compatibility: Engineered specifically for the 51T mount system on 13.7" and 13.9" barrels, ensuring a secure and repeatable fit. Pingless Design: Eliminates the need for traditional pinning during installation, simplifying the process without sacrificing security or reliability. 7.62 NATO / 5/8x24 Thread: Optimized for 7.62 NATO caliber rifles with a 5/8x24 thread pitch for broad platform compatibility. SCARmor Black Finish: Durable SCARmor coating provides superior corrosion resistance and a low-profile, tactical black appearance built to last. Polymer Witness Block Included: Comes with a Polymer Witness Block to facilitate proper alignment and confident, accurate installation. Specs Brand: Advanced Armament Corp (AAC) Model: 51T Pingless Flash Hider Caliber: 7.62 NATO Thread Pitch: 5/8x24 Compatible Barrel Lengths: 13.7" / 13.9" Mount Type: 51T Finish: SCARmor Black Includes: Polymer Witness Block (PWB) MPN: 65034 UPC: 850036491828 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. ]]>