Luth-AR AR-15 Low Profile Gas Block Manganese Phosphate., .936"

The Luth-AR AR-15 low profile gas block is a straightforward, Made in the USA component for builders and gunsmiths looking to run a slimmer profile on their rifle's handguard. If you're assembling an AR-15 with a low-profile rail system and need a gas block that won't interfere with your furniture or optic mounting, this .936" bore-size block keeps the gas tube tucked tight under slim handguards. The manganese phosphate finish provides corrosion resistance without the weight or bulk of a full-size block—a smart choice for anyone prioritizing a clean, compact build.

This gas block ships with two set screws and one roll pin, giving you the hardware needed to secure it to your barrel. The .936" inner diameter fits standard AR-15 barrel profiles; confirm your barrel's gas port size before ordering to ensure proper function. Assembly is straightforward: align the block over the gas port, use the set screws to hold it in place, and drive the roll pin through for a solid mechanical lock. It's a no-frills, no-nonsense part that does its job without theatrics.

Whether you're building a lightweight recce rifle, an MDR setup, or just want to clear up rail real estate, a low-profile gas block is a smart foundational choice. Luth-AR's reputation for domestic manufacturing and reliable AR-15 parts speaks for itself among serious builders.

Key Features

• Low-profile design compatible with slim handguard systems
• .936" bore diameter for standard AR-15 barrels
• Manganese phosphate finish resists corrosion
• Made in the USA
• Secured with two set screws and one roll pin

Specifications

Frequently Asked Questions

Will this low-profile gas block fit my AR-15?

This gas block has a .936" bore diameter, which is the standard size for most AR-15 barrels. Verify your barrel's gas port diameter before purchase to ensure compatibility.

What's included in the box?

The gas block comes with two set screws and one roll pin for installation. You'll need standard AR-15 assembly tools and punches to drive the roll pin, but all fasteners are supplied.

Can I use this under a free-floating handguard?

Yes—the low-profile design is specifically engineered to sit beneath slim, free-floating rail systems without interference. It's an ideal choice for builds prioritizing clean lines and low-profile aesthetics.

Is the manganese phosphate finish durable?

Manganese phosphate is a proven military-grade finish that resists corrosion and wear. It's a standard choice for AR-15 components and will hold up to regular use and field conditions.