LBE Unlimited ARGTC AR-15 Carbine Length Gas Tube Melonite Black

The LBE Unlimited ARGTC is a carbine-length gas tube built for direct-impingement AR-15 platforms. Manufactured in the USA from 304 stainless steel seamless tubing and finished in a durable Melonite (black nitride) coating, this gas tube is engineered for the heat, pressure, and fouling environment of a duty-grade semi-automatic rifle.

Designed to drop into a standard carbine-length gas block on AR-15-pattern uppers, the ARGTC is a direct replacement for worn or upgraded components and ships with the required gas tube roll pin for installation. Builders and armorers rely on this configuration to pair with carbine-length handguards and standard front sight base assemblies.

The black Melonite finish provides excellent corrosion resistance, surface hardness, and natural lubricity - reducing carbon fouling adhesion and extending service life under hard use. As part of LBE Unlimited's Made-in-the-USA small parts lineup, the ARGTC is a dependable choice for a complete custom build, a freshened-up upper, or a shop's spare-parts inventory.