Riflespeed AR15 Mid-Length Gas Tube Kit. Choose a RIFLESPEED premium-quality straight gas tube for use with the innovative line of Riflespeed Gas Controls on the AR15 or AR10 rifle. Specifications for Riflespeed AR15 Gas Tube Kit: Manufacturer: Riflespeed Color: Stainless Fabric/Material: Stainless Steel Features of Riflespeed Straight Gas Tube Kit Riflespeed Gas Tbes are straight for increased strength and comatibility with Riflespeed Gas Tubes. Package Contents: Riflespeed AR15 Gas Tube Kit Riflespeed US0146: Straight Gas Tube Kit Stainless Steel Midlength