CMC Triggers 81625 AR-15/AR-10 Gas Tube Rifle Length 15.16" 304 Stainless - Black Nitride

The CMC Triggers 81625 AR-15/AR-10 Gas Tube is a precision-machined rifle-length replacement gas tube built from 304 stainless steel and finished in a durable black nitride coating. Designed as a direct-fit component for standard AR-15 and AR-10 upper receivers, this tube channels high-pressure gas from the barrel gas port to the bolt carrier via the carrier key, keeping the direct-impingement system cycling reliably.

At a full 15.16" overall length, this is the proper rifle-length gas tube configuration, intended for use with rifle-length handguards and corresponding gas-block placement on extended front ends. The black nitride finish is not a surface coating but a surface-hardening treatment that penetrates the steel, increasing wear resistance and providing long-lasting protection against heat, corrosion, and carbon fouling in the harsh environment inside the upper receiver.

Whether you are building a new complete upper, replacing a worn factory tube, or upgrading to a more corrosion-resistant component, the CMC Triggers gas tube delivers a precision fit and consistent function. CMC Triggers is well-known in the AR-15/AR-10 community for quality drop-in triggers and tight-tolerance machined components, and this gas tube reflects the same commitment to quality manufacturing. Pair it with a matching rifle-length gas block (low-profile or traditional) to complete your upper assembly.