BCM Low Profile Gas Block for AR15, M16, M4, M4A1. Machined of steel, phosphate finish, for .750 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

Made in USA