The KAK Mid Length Gas Tube is designed specifically for AR-15 platforms, providing reliable gas flow for optimal cycling performance. This American-made component ensures a perfect fit for your firearm build, enhancing overall efficiency. Please note that a roll pin is not included with the purchase. Designed for mid-length gas systems, this gas tube is an essential part for maintaining your firearm's reliability and performance. Its durable construction and precise engineering make it a dependable choice for any gunsmith or enthusiast looking to complete their AR-15 project.