Guntec USA AR-15 Carbine Length Gas Tube 9.75in Stainless Steel. There are a number of reasons for this and our gas tube is just one of those reasons. Sometimes you need a new gas tube and we offer a replacement while others may just be a simple repair. We want you to be able to convert your AR-15 to a Jr model or SBR so that you don't need to waste a perfectly good Gas Tube. That is why we offer a replacement gas tube. Our gas tube is durable and will not break or leak (we guarantee that it will). We use top-quality materials and our gas tube will provide you a lifetime of service. Specifications for Guntec USA AR-15 Gas Tube: Manufacturer: Guntec USA Gun Model: AR-15 Package Contents: Guntec USA AR-15 Gas Tube What firearm models does the manufacturer say Guntec USA AR-15 Gas Tube is compatible with? The manufacturer says that Guntec USA AR-15 Gas Tube is compatible with AR-15GUNTEC USA C-TUBE: AR-15 9.75in Carbine Length Gas TubeStainless Steel