Comstock Armory Full Size 9mm Flash Hider – 5/8×24
The Comstock Armory full-size 9mm flash hider (SKU: fhl-58-9) is a robust muzzle device designed for 9mm platforms using larger barrel threads. It balances high-efficiency flash mitigation with a precision suppressor mounting interface.Â
The FHL-58-9 is engineered for shooters using 9mm carbines or specialized builds (like .350 Legend) that require a 5/8×24 thread pitch. It functions as a standalone flash hider or as a “suppressor-ready” mount for the popular Plan-B style adapter system.Â
- Suppressor Compatibility: Specifically designed to fit within the .900″-24 internal geometry of the Comstock LPA, Q Plan-B, and Rearden Atlas mounts.
- No Timing Required: The symmetrical port design eliminates the need for shims or crush washers, allowing the device to be torqued directly to the barrel shoulder.
- Flash & Blast Mitigation: The internal geometry is optimized to break up muzzle flash while acting as a “sacrificial baffle,” shielding your suppressor’s expensive blast baffle from premature erosion.
- Precision Machining: Manufactured from 17-4 PH stainless steel, ensuring it can handle the high heat and pressure of rapid fire.



