Comstock Armory FHXL Extended 1/2x28 Flash Hider Suppressor Mount - Plan-B Compatible

Comstock Armory FHXL 13.7 P&W Extended 1/2x28 Flash Hider Suppressor Mount - Plan-B Compatible

The FHXL Flash Hider is engineered for shooters who demand performance, durability, and seamless suppressor integration. Designed to work with popular .900″-24 adapters like the Comstock LPA, Q Plan-B, and Rearden Atlas, this flash hider offers quick suppressor attachment, enhanced muzzle control, and extended barrel compliance—making it the ideal solution for 13.7" or 13.9" barrels that need to reach the 16" legal threshold when pinned and welded.

Crafted from high-strength 17-4 PH stainless steel and finished in black nitride, the FHXL is built to withstand extreme conditions while minimizing blast baffle wear by redirecting expanding gases outward. Its rotationally symmetric design eliminates the need for timing or shims, and the predrilled pin hole makes permanent installation fast and easy.

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

Legal Barrel Extension
Designed to bring most 13.7" or 13.9" barrels to 16" when pinned and welded.

Durable Construction
Made from high-strength 17-4 PH stainless steel for extreme resilience.

Corrosion-Resistant Finish
Black nitride coating offers long-lasting protection and sleek aesthetics.

Standard Threading
1/2-28 threads fit most 5.56/.223 barrels for broad compatibility.

Easy Installation
3/4" wrench flats allow for quick and secure mounting or removal.

Flash Suppression
Effectively hides muzzle flash to preserve night vision and reduce signature.

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

Pin-Ready Design
Predrilled for easy pinning and welding to meet legal barrel length requirements.

Specifications

• Caliber Compatibility: Supports bullets up to .223 or 5.56mm
• Material: 17-4 PH stainless steel
• Finish: Black nitride
• Thread Pattern: 1/2-28 (compatible with 5.56/.223 barrels)
• Adapter Compatibility: .900″-24 (Comstock LPA, Q Plan-B, Rearden Atlas)
• Suppressor Mounting: Quick attachment/removal supported
• Length: 2.94" overall (~2.3" added to muzzle)
• Weight: 3.3 ounces
• Installation: 3/4" wrench flats for easy install/removal
• Timing: Rotationally symmetric; no shims required
• Pin/Weld: Predrilled for permanent installation on 13.7"/13.9" barrels