Advanced Armament Corp 51T Pingless Flash Hider 5/8x24 – 13.7" Pin & Weld Barrel Compatible

The AAC 51T Pingless Flash Hider is a suppressor-ready muzzle device designed to eliminate the characteristic "ping" sound of traditional flash hiders while serving as a quick-detach mount for AAC 51T suppressors. The pingless design features tines tuned to dampen resonance, reducing audible signature when shooting unsuppressed. This version is sized specifically for pin-and-weld installation on 13.7" barrels to meet the 16" legal minimum without requiring an NFA tax stamp for short-barreled rifles.

Machined from heat-treated steel with a durable black oxide finish, this flash hider features 5/8x24 threading common to .308/7.62 caliber rifles. Installation requires permanent pin-and-weld by a qualified gunsmith to achieve legal overall length. Once installed, the 51T mount allows rapid attachment and detachment of compatible AAC suppressors. Use of AAC suppressors requires appropriate NFA paperwork and tax stamp.

• Type: Flash Hider / Suppressor Mount
• Thread Pitch: 5/8x24
• Design: 51T Quick-Detach (Pingless)
• Material: Heat-Treated Steel
• Finish: Black Oxide
• Installation: Pin & Weld (Permanent)
• Compatible Firearms: 13.7" .308/7.62 rifles with 5/8x24 threads