{"product_id":"rosco-manufacturing-gas-tube-patrol-length-black-nitride-ar-15","title":"Rosco Manufacturing Gas Tube Patrol Length Black Nitride - AR-15","description":"\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eThe \u003cstrong\u003e\u003cspan style=\"background-color: #ffff00;\"\u003eRosco Manufacturing Gas Tube\u003c\/span\u003e\u003c\/strong\u003e in \u003cstrong\u003ePatrol Length\u003c\/strong\u003e is a precision-made \u003cstrong\u003eAR-15 upper receiver component\u003c\/strong\u003e finished in a durable \u003cstrong\u003e\u003cspan style=\"background-color: #ffff00;\"\u003eBlack Nitride\u003c\/span\u003e\u003c\/strong\u003e (Melonite) coating. \u003cstrong\u003ePatrol Length\u003c\/strong\u003e is Rosco's proprietary gas system length, designed for use with their purpose-built Patrol Length gas blocks and barrels.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eThe \u003cstrong\u003eBlack Nitride\u003c\/strong\u003e finish is a surface-hardening treatment that penetrates the steel to dramatically increase \u003cstrong\u003ecorrosion resistance\u003c\/strong\u003e, \u003cstrong\u003ewear resistance\u003c\/strong\u003e, and \u003cstrong\u003efatigue strength\u003c\/strong\u003e 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 \u003cstrong\u003eAR-15\u003c\/strong\u003e around Rosco's Patrol Length gas system, this tube is a direct-fit replacement or premium upgrade.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eDesigned as a drop-in part for compatible \u003cstrong\u003eAR-15 upper receivers\u003c\/strong\u003e 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.\u003c\/span\u003e\u003c\/p\u003e","brand":"Rosco Manufacturing","offers":[{"title":"Default Title","offer_id":55048690794818,"sku":"179519","price":22.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0997\/7921\/5682\/files\/hires_ecb41c89-54d1-4eb4-9a42-f7ee8b037265.png?v=1784702243","url":"https:\/\/centerfiresystems.com\/products\/rosco-manufacturing-gas-tube-patrol-length-black-nitride-ar-15","provider":"Centerfire Systems","version":"1.0","type":"link"}