AAC Blackout Flash Hider 51-Tooth Suppressor Mount - Steel Matte Finish | Advanced Armament Co.

The AAC Blackout Flash Hider 51-Tooth Suppressor Mount is a purpose-built muzzle device for shooters running suppressors on the 51T platform. If you're tired of muzzle flash lighting up your position—especially on short-barreled rifles—this open-end, 3-prong design delivers serious flash reduction without the durability penalties of older closed-end alternatives. Built from aerospace-grade steel and finished in a hard, corrosion-resistant matte coating, it's engineered to handle sustained fire and rough field use without erosion or wear that can compromise performance over time.

The 3-prong geometry is inherently stiffer than 4-prong designs, which matters when you're running suppressed firearms regularly. Whether you're shooting subsonic hunting loads, precision rifle work, or tactical applications, the open-end construction prevents the carbon buildup and thermal stress that plague closed designs. This one ships with Rocksett already included, so you can get it mounted without sourcing adhesive separately.

Sized for 7.62mm/.308-class barrels with standard 5/8x24 threads, the Blackout integrates directly with AAC suppressors or any suppressor using the 51T quick-attach interface. It's the kind of component that works hard in the background—eliminating flash signature, managing recoil impulse, and staying reliable through hundreds of rounds without degradation.

Key Features

• Open-end, 3-prong design resists wear and thermal erosion compared to closed-end units
• Aerospace-grade steel construction with hard-coat matte finish for corrosion resistance
• Effective muzzle flash reduction, even on short barrels
• Integrates with AAC 51-tooth suppressors and compatible quick-attach systems
• Rocksett mounting adhesive included

Specifications

Frequently Asked Questions

What barrels and rifles is the 51-tooth mount compatible with?

This flash hider threads onto barrels with standard 5/8x24 threads, common on most 7.62mm/.308 rifles and short-action magnums. It works with any suppressor featuring the AAC 51-tooth quick-attach interface, or adapters designed for that standard. Confirm your barrel's thread pitch before ordering.

How is the open-end design better than closed-end flash hiders?

Open-end designs avoid the carbon buildup and thermal stress that accumulate inside closed housings, especially under suppressed fire. The 3-prong structure is also geometrically stiffer than 4-prong alternatives, reducing flexing and wear over extended use.

Is Rocksett included, and how do I install it?

Yes, Rocksett is included in the package. Apply it to the threads according to the adhesive instructions, thread the hider on, and let it cure before shooting. This ensures a permanent, secure mount.

Will this reduce muzzle flash on a short-barreled rifle?

Yes. The AAC Blackout is specifically designed to suppress muzzle flash even on short barrels where flash is most pronounced, making it a solid choice for SBR builds or compact rifles.