The Bravo Company (BCM) low-profile gas block sits under a free-float rail on AR-15/M4 builds with a .750" barrel journal. The bore is honed to spec for proper gas alignment.

Features:

• .750" journal, honed to spec
• Machined steel with phosphate finish
• Low-profile height clears free-float rails
• Includes two 10-32 knurled set screws

Gas tube is not included. Fits .750" barrel journals only — not .625" or .875".