Great Lakes Firearms and Ammunition Mid-Length Gas Tube Kit Features The Great Lakes Firearms and Ammunition Mid-Length Gas Tube Kit is built from steel to withstand the heat and pressure that cycle through an AR-15 s gas system with every shot fired. Sized specifically for mid-length gas system applications the tube routes gas from the barrel s gas port back to the bolt carrier group at the correct length to maintain proper timing and reliable cycling. Using a gas tube matched to the intended gas system length helps prevent the short stroking or excessive bolt carrier velocity that can result from a mismatched length. This attention to fit makes the kit a dependable choice when building or repairing a mid-length AR-15 upper. The kit includes the roll pin needed to secure the gas tube to the gas block saving builders a trip to source separate hardware mid build. Having the pin included streamlines the installation process and ensures the correct pin size is on hand for the job. A properly installed gas tube is a small but critical part of overall rifle reliability and this steel Great Lakes Firearms and Ammunition tube is built to handle that role for the long term. For AR-15 builders and armorers who need a dependable mid-length gas tube the Great Lakes Firearms and Ammunition kit is available for sale at GrabAGun. Great Lakes Firearms and Ammunition Mid-Length Gas Tube Kit Specifications Model: Gas Tube Kit Material: Steel Size: Mid-Length Compatible Hosts: AR-15 Includes: Gas Tube with Pin Available At: GrabAGun