Comstock Armory FHL 5/8x24 Flash Hider Suppressor Mount - Plan-B Compatible

Comstock Armory FHL 5/8x24 Flash Hider Suppressor Mount - Plan-B Compatible

The FHL Full-Size Flash Hider is purpose-built for shooters who demand high-performance suppressor compatibility and long-term durability. Unlike conventional flash hiders, the FHL is engineered to redirect expanding gases outward, dramatically reducing blast baffle wear and extending the life of your suppressor system.

Compatible with popular .900″-24 adapters like the Comstock LPA, Q Plan-B, and Rearden Atlas, this flash hider supports quick suppressor attachment and removal while maintaining a compact, efficient profile. Made from 17-4 PH stainless steel and finished in black nitride, the FHL offers exceptional strength, corrosion resistance, and a sleek tactical look.

With standard 5/8-24 threading, rotational symmetry, and a predrilled pin hole for easy welding on 14.5" barrels, the FHL is ideal for builders looking to meet the 16" legal length requirement without sacrificing performance. Whether you're running 5.56, .223, or even up to 9mm and 350 Legend, this flash hider is ready to deliver.

Suppressor Compatibility
Works with .900″-24 adapters like Comstock LPA, Q Plan-B, and Rearden Atlas for fast suppressor mounting.

Blast Baffle Protection
Redirects expanding gases outward to reduce suppressor wear and extend service life.

Premium Material
Constructed from high-strength 17-4 PH stainless steel for rugged durability.

Corrosion-Resistant Finish
Black nitride coating offers long-lasting protection and a clean, tactical appearance.

Universal Threading
Standard 5/8-24 threads fit most common barrels, including calibers up to 9mm and 350 Legend.

Easy Installation
13/16" wrench flats allow for secure and hassle-free mounting or removal.

Flash Suppression
Effectively hides muzzle flash to reduce visual signature and preserve low-light visibility.

No Timing Required
Rotationally symmetric design eliminates the need for shims or alignment.

Pin-Ready Design
Predrilled for easy pinning and welding on 14.5" barrels to meet 16" legal length.

Specifications

• Caliber Compatibility: Supports bullets up to 9mm, including 350 Legend
• Material: 17-4 PH stainless steel
• Finish: Black nitride
• Thread Pattern: 5/8-24 (compatible with most common barrels)
• Adapter Compatibility: .900″-24 (Comstock LPA, Q Plan-B, Rearden Atlas)
• Suppressor Mounting: Quick attachment/removal supported
• Gas Redirection: Outward flow to reduce blast baffle wear
• Length: 2" overall (~1.36" added to muzzle)
• Weight: 1.8 ounces
• Installation: 13/16" wrench flats for easy install/removal
• Timing: Rotationally symmetric; no shims required
• Pin/Weld: Predrilled for permanent installation on 14.5" barrels