Comstock Armory Compact Facemount Plan-B Flash Hider, 1/2x28, 9mm, Black Nitride The Comstock Armory FHC-12-9-FM is a compact facemount flash hider combining 1/2x28 barrel threads with a Plan-B suppressor-mount interface. Its 9mm configuration, 17-4 PH stainless steel construction and black nitride finish identify this exact version. This specialized facemount design is intended for a barrel that lacks a suitable mounting shoulder. It seats against the muzzle face and is not intended for a conventional shouldered barrel such as a standard AR-15 barrel. Matching the thread pitch alone does not establish fit. Shop the Comstock Armory FHC-12-9-FM at BattleHawk Armory for your compatible 1/2x28 setup. Flash Reduction and Blast-Baffle Protection The flash-hider geometry reduces visible muzzle flash, while its outward gas direction helps limit wear at the suppressor blast baffle. This gives the device a defined role both as a flash hider and as the mounting point for a compatible suppressor. The rotationally symmetric body does not require timing shims. Its black nitride treatment gives the stainless steel a durable, dark finish, while the wrench flats provide a dedicated tool interface. Compatibility and Configuration The suppressor-side interface fits compatible 0.900-24 Plan-B adapters, including Comstock LPA, Q Plan-B and Rearden Atlas. Barrel threading, bore clearance and the suppressor's internal space must all suit the intended configuration. The muzzle device does not establish the caliber rating of the suppressor. The facemount body overlaps the barrel by 0.50 inch. Some barrel geometries can leave threads visible at its rear. The complete device is 1.6 inches long and weighs 1.9 ounces. Select this version specifically for its face-seating geometry. Product Specifications Manufacturer: Comstock Armory Model / Manufacturer SKU: FHC-12-9-FM UPC: 850069580186 Product type: Compact Facemount Flash Hider Material: 17-4 PH stainless steel Finish: Black nitride Weight: 1.9 oz Barrel threads: 1/2x28 Mounting system: Plan-B pattern; complete-system fitment required Bore compatibility: Up to 9mm Overall length: 1.6 inches Mounting geometry: Facemount for barrels without a suitable shoulder; 0.50-inch barrel overlap Frequently Asked Questions Is a suppressor included?No. This product is the muzzle device. A compatible suppressor and suppressor-side adapter are separate components. Can I use this on a standard shouldered barrel?This facemount version is intended for a barrel without a suitable shoulder. Choose the correct mounting geometry as well as the correct thread pitch and bore. Choose the Comstock Armory FHC-12-9-FM at BattleHawk Armory for a correctly matched compact facemount flash hider and Plan-B mounting interface.