Product DescriptionBcm gas block low profile.625 black steel
-Low profile gas block (steel with set screws)
-BCM Low Profile Gas Block for AR15, M16, M4, M4A1. Machined of steel, phosphate finish, for .625 barrels.
-Manufactured within very tight Mil-Spec tolerances on all ID's.
-Barrel ID honed after finish per USGI TDP.
-Made by Bravo Company MFG, Inc. with set screw mounting
-Set Screws are Steel 10-32 x 3/16 Knurled Cup Point