Product Description The Advanced Armament Corp (AAC) BlackOut Pingless Flash Hider is an exceptionally engineered muzzle device designed for shooters who demand superior flash suppression and reliable performance. Chambered for 5.56 NATO with a 1/2x28 thread pitch, this flash hider is specifically built to fit the 51T mount and is sized to bring 13.7" and 13.9" barrels to a 16" overall length when pinned and welded. The open-end, 3-prong design provides inherently greater strength compared to 4-prong alternatives and avoids the wear and erosion issues commonly seen in closed-end designs. Machined from high-strength aerospace-grade steel alloy and finished in AAC&';s hard, durable, corrosion-resistant SCARmor coating in black, this flash hider is built to withstand demanding environments. A pre-drilled pilot hole makes pinned and weld installation straightforward, and Rocksett thread-locking compound is included. The pingless design, when torqued to the correct specification, virtually eliminates the characteristic ringing sound associated with conventional flash hiders. A Polymer Witness Block is included for proper installation reference. Product Highlights Highly Effective Flash Suppression: The open-end, 3-prong BlackOut design eliminates muzzle flash even on short barrels, making it ideal for 13.7" and 13.9" barrel configurations. Pingless Design: When torqued to the correct specification, this flash hider operates without the disruptive ringing sound common to traditional prong-style flash hiders. Aerospace-Grade Steel Construction: Machined from high-strength aerospace steel alloy for maximum durability, wear resistance, and long service life. SCARmor Finish: Hard, corrosion-resistant black SCARmor coating protects against the elements and provides a sleek, tactical appearance. Pin and Weld Ready: Pre-drilled pilot hole and included Rocksett compound simplify installation; brings 13.7"/13.9" barrels to 16" OAL when pinned and welded per NFA requirements. Specs Brand: Advanced Armament Corp (AAC) Model: BlackOut Flash Hider Type: Flash Hider (Muzzle Device) Caliber: 5.56 NATO Thread Pitch: 1/2x28 Mount Compatibility: 51T Mount Barrel Fit: 13.7" / 13.9" Barrels Design: Open-End, 3-Prong, Pingless Finish: SCARmor Color: Black Material: High-Strength Aerospace Steel Alloy Includes: Rocksett Thread-Locking Compound, Polymer Witness Block Manufacturer Part Number (MPN): 65035 UPC: 850036491835 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. ]]>