AAC 51T Pingless Flash Hider 1/2x28 for 13.7" Pinned & Welded Barrels – AR-15 5.56/.223

The AAC 51T Pingless Flash Hider is a three-prong suppressor mount and flash hider designed for 13.7-inch barrels requiring a pinned and welded muzzle device to meet the 16-inch legal minimum barrel length. The pingless design eliminates the characteristic ringing sound found in standard birdcage flash hiders while providing effective flash suppression. This device serves as both a standalone flash hider and a quick-detach mount for AAC 51T-compatible suppressors.

Machined from heat-treated steel with a black oxide finish, this flash hider features 1/2x28 threads standard for AR-15 platform rifles in 5.56 NATO and .223 Remington. The extended length is specifically engineered to bring a 13.7-inch barrel to the required 16-inch overall length when permanently attached. Installation requires professional pinning and welding by a qualified gunsmith to ensure compliance with NFA regulations. Once installed, removal requires cutting and is considered a permanent modification.

• Type: Flash Hider / Suppressor Mount
• Caliber: 5.56 NATO / .223 Remington
• Thread Pitch: 1/2x28
• Material: Heat-Treated Steel
• Finish: Black Oxide
• Suppressor Compatibility: AAC 51T QD Suppressors
• Intended Barrel Length: 13.7 inches (for pin and weld to 16 inches)
• Compatible Firearms: AR-15 Platform (5.56/.223)