Faxon Firearms Low Profile Fixed Gas Block .625" 4150 Steel - 3 Screw

The Faxon Firearms Low Profile Gas Block is an ultra-low profile, fixed gas block machined from 4150 steel and designed for AR-15 barrels with a .625" gas journal diameter. Listed by Faxon as the ideal companion to their own barrel lineup, it fits any standard AR-15 barrel using the same .625" gas journal, delivering reliable gas flow to direct impingement systems without the bulk of a front sight tower.

The block clamps to the barrel gas journal with three set screws driven by an Allen key, locking it firmly in place once the bore is aligned with the gas port. Its ultra-low profile measures roughly 1.00" wide by 1-7/32" tall, clearing slim free-float handguards, low-profile rail systems, and front sight bases with room to spare. Because it is built from the same 4150 steel used in Faxon Firearms barrels, the gas block matches the barrel material for consistent thermal behavior and a clean look up under the handguard.

Weighing in at approximately 0.07 lbs, installation is straightforward: slide the block over the gas journal, square it up with the gas tube port, and torque the three mounting screws evenly. This is a simple, no-nonsense drop-in for builders running a standard .625" gas journal AR-15 build who want a low-profile, fixed gas block at a sensible weight.