The BCM Low Profile gas block is a steel low-profile gas block for AR-15, M16, M4, and M4A1 rifles with a .625" barrel diameter at the gas block, suitable for use under free-float handguards.
It is machined to very tight mil-spec tolerances on all internal diameters; the barrel bore is honed after finishing in accordance with the USGI TDP. It is secured via 10-32 x 3/16" knurled cone point steel set screws.
Main features
Low profile
Steel with phosphate finish
Internal diameter for .625" barrels
Barrel bore honed after finishing per USGI TDP
Secured with 10-32 x 3/16" set screws
Compatibility
AR-15, M16, M4, and M4A1 with a .625" barrel at the gas block.