Rosco Manufacturing Gas Tube Patrol Length Black Nitride - AR-15

The Rosco Manufacturing Gas Tube in Patrol Length is a precision-made AR-15 upper receiver component finished in a durable Black Nitride (Melonite) coating. Patrol Length is Rosco's proprietary gas system length, designed for use with their purpose-built Patrol Length gas blocks and barrels.

The Black Nitride finish is a surface-hardening treatment that penetrates the steel to dramatically increase corrosion resistance, wear resistance, and fatigue strength compared to standard phosphate or unfinished gas tubes. The process hardens the outer layer while preserving precise dimensional tolerances, so the tube installs cleanly and holds up to repeated heat cycles and hard use. For anyone building or upgrading an AR-15 around Rosco's Patrol Length gas system, this tube is a direct-fit replacement or premium upgrade.

Designed as a drop-in part for compatible AR-15 upper receivers set up for the Patrol Length gas system. Like all Rosco components, it is manufactured to the tight standards the brand is known for across its Bloodline, K9, and Husky barrel lines.