AAC (Advanced Armament) Blackout Fh 90t 7.62mm 5/8x24

The AAC Blackout Flash Hider 90T is a 7.62mm muzzle device built for AR-10s, M110s, and other tactical rifles where flash signature matters. Threaded 5/8x24, this 3-prong open-end design cuts muzzle flash effectively—even on shorter barrels—without the durability compromises of closed-end alternatives. If you're running suppressed or need to keep your signature low downrange, this is the kind of straightforward, proven device that works harder than it looks.

AAC machines the Blackout from high-strength aerospace steel and applies a hard SCARmor finish that resists corrosion and abuse in the field. The open-end geometry means less wear and erosion over time compared to closed designs—important when you're counting on repeatability. It's not a compensator or a brake; it's laser-focused on one job: flash reduction.

Rocksett is included, so you're ready to mount right out of the box. Whether you're shooting from a bench, hunting at distance, or training in low light, the Blackout keeps your position and sight picture cleaner by minimizing the flash bloom that can wash out your optics or compromise your night vision.

Key Features

• 3-prong open-end design for superior flash elimination on short and standard barrels
• Aerospace steel with durable SCARmor corrosion-resistant finish
• Open-end construction resists wear and erosion better than closed-end designs
• 5/8x24 thread pitch for AR-10, M110, and similar 7.62mm platforms
• Rocksett included for secure installation

Specifications

Frequently Asked Questions

Will this fit my AR-10?

Yes. The AAC Blackout 90T is chambered 5/8x24, the standard thread pitch for most AR-10 and .308 AR-platform barrels. Verify your barrel's thread pattern before purchase.

How does the 3-prong design compare to 4-prong flash hiders?

AAC designed the 3-prong configuration to be inherently stronger and more durable than 4-prong units. The open-end geometry also resists the wear and erosion that closed-end designs commonly experience under sustained fire.

What's included?

Rocksett is included with the Blackout, so you have the thread-locking compound you need for installation.

Is this a compensator or a muzzle brake?

No. The Blackout is a flash hider, optimized specifically for reducing muzzle flash. It is not designed to manage recoil.