A BCM low-profile gas block is a core component for any AR-15 or LR-308 build that demands reliability and precise fit. Unlike bulkier standard-profile blocks, the low-profile design keeps your rail system and mounted accessories clear of interference while maintaining the gas regulation your rifle needs to cycle reliably. Bravo Company machines these blocks to Mil-Spec tolerances from quality steel, then phosphate-finishes them for dependable corrosion and wear resistance—whether you're running a duty rifle, a precision build, or a hard-use hunting platform.

Installation is straightforward: the block mounts via set screws, giving you a secure hold without permanent modifications. BCM offers two bore sizes to match your barrel's gas port diameter, so you get the right fit for your specific setup. The low-profile footprint lets you maximize rail real estate for optics, lights, and other gear without forcing compromises on your intended configuration.

If you're building an AR or upgrading a gas system, a precision-machined, properly-sized gas block is non-negotiable. BCM's reputation in the AR world is built on attention to detail and no-nonsense performance—and this block reflects that standard.

Key Features

• Mil-Spec machined steel construction for tight tolerances and durability
• Low-profile design preserves rail space for optics and accessories
• Phosphate finish resists corrosion and wear
• Set-screw mounting for secure, repeatable installation
• Available in .625" and .750" bore sizes for matched fit
• Fits standard AR-15 and LR-308 barrels

Specifications

Brand	Bravo Company (BCM)
Product Type	Low-Profile Gas Block
Compatibility	AR-15, LR-308 barrels
Bore Sizes Available	.625", .750"
Material	Steel
Finish	Phosphate
Mounting	Set screws
Tolerance Standard	Mil-Spec

Frequently Asked Questions

What barrel sizes does this BCM gas block fit?

The block comes in two bore sizes: .625" and .750". You'll need to match the bore diameter to your barrel's gas port. Verify your barrel's gas port size before ordering to ensure proper fit.

Will a low-profile gas block work with my rail system?

Yes. The low-profile design is specifically engineered to minimize interference with picatinny rails and mounted accessories, giving you more usable rail space compared to standard-profile blocks.

How do I install the BCM gas block?

The block mounts via set screws that you tighten to secure it to the barrel. The set-screw design allows clean installation without permanent modifications and enables removal or repositioning if needed.

Is this gas block suitable for AR-15 or LR-308 builds?

Yes, the BCM low-profile gas block is designed to fit both AR-15 and LR-308 barrels, making it versatile across the most common modern sporting rifle platforms.