BCM Low-Profile Gas Block .625 — Steel, Black Phosphate

Description

The Bravo Company (BCM) Low-Profile Gas Block is a steel gas block finished in black phosphate and designed for use on AR-15/M16/M4/M4A1 platforms. Engineered to work with .625-inch barrel journals, it uses set-screw mounting and is manufactured to tight Mil-Spec tolerances. Barrel ID is honed after finish per USGI technical data practice for consistent gas alignment. Set screws are steel 10-32 x 3/16 knurled cup point for secure attachment.

Key Specifications

• Designed for AR-15, M16, M4, M4A1 platforms.
• Fits barrels with an inside diameter of .625 inches.
• Constructed from steel for durability.
• Finished in black phosphate.
• Mounting uses set-screw (Steel 10-32 x 3/16 knurled cup point) attachment.
• Manufactured to very tight Mil‑Spec tolerances.
• Barrel ID is honed after finish per USGI TDP.
• Overall listed dimensions are 1.40 x 3.20 x 7.00 inches.
• Product type is a low-profile gas block.

Whether you’re assembling a compact carbine or refining a service rifle build, this BCM low-profile gas block provides a compact, durable solution for precise gas alignment and secure mounting. The steel construction and black phosphate finish offer long-term serviceability while the set-screw installation keeps the block low-profile under many rail systems.