The San Tan Tactical AR15 Gas Tube features a durable nitride finish and carbon length configuration designed for reliable performance in AR15 builds and upgrades.San Tan Tactical AR15 Gas Tube KitNitride coating with matte finish for enhanced durabilityCarbon length specification for proper cyclingIncludes gas tube pin for complete installationPrecise manufacturing for optimal fit and functionLong-term reliability and durable constructionEngineered with high-quality components and precise manufacturing standards this gas tube kit ensures years of dependable service for maintaining and upgrading AR15 firearms.