Leapers Leapers Pro Commercial Spec Receiver Extension Tube Features The Leapers Leapers Pro Commercial Spec Receiver Extension Tube is CNC machined from 6061-T6 aircraft grade aluminum giving it the strength needed to handle the repeated cycling of a collapsible AR-15 stock. Precisely rolled threads provide durable secure engagement with the lower receiver reducing the chance of loosening over extended use. The tube is machined to commercial-spec diameter matching the broad range of collapsible stocks built to that same standard. Tight tolerance controls throughout manufacturing ensure a secure fit and dependable function with various aftermarket stock options. Finished in a matte black Type III Class II hard coat anodize the tube resists wear and corrosion while matching the look of most black AR-15 builds. This 6-position tube is proudly designed and made in the USA reflecting Leapers commitment to domestic manufacturing on key components. Builders upgrading a worn stock or completing a new build will find this tube a dependable foundation for their collapsible stock system. AR-15 owners looking for a durable American made receiver extension tube will find the Leapers Leapers Pro a solid choice. Leapers UTG Pro Commercial Spec Receiver Extension Tube Specifications Manufacturer: Leapers Model: UTG Pro Commercial Spec Receiver Extension Tube Type: Extension Tube Compatible Hosts: AR-15 Color: Black Material: 6061-T6 Aluminum Finish: Matte Black Hard Coat Anodize Quantity: 1 Available At: GrabAGun