Comstock Armory Compact Flash Hider 5/8x24 9mm Black Nitride - Plan B Compatible

The Comstock Armory Compact Flash Hider is a precision muzzle device engineered for 5/8x24 threaded barrels chambered in 9mm Luger, and is also a popular fit for .350 Legend barrels that share the same thread pitch. Built as a compact-format flash hider and suppressor mount, it dramatically reduces muzzle flash while giving the end user a solid, repeatable interface for quick suppressor attachment and removal.

The hider is CNC-machined from high-strength 17-4 PH stainless steel and finished in corrosion-resistant black nitride for long-term durability in harsh conditions. Its porting design directs expanding gases outward and forward, which reduces blast baffle wear on attached suppressors and helps keep the system running cleaner shot after shot. The integrated Plan B compatible interface accepts Plan B pattern mounting hardware, making suppressor swaps tool-free and repeatable.

This compact configuration is purpose-built for 9mm pistol-caliber carbines and AR-pattern platforms running 5/8x24 threaded barrels where a shorter, lighter muzzle device is preferred. Whether you are running the hider on its own or stepping it up to a suppressor via the Plan B mount, the FHC-58-9 delivers a clean, low-signature solution for your 9mm build.