CMC Triggers Buffer Tube Features The CMC Triggers Buffer Tube is machined from 7075 aluminum an alloy chosen for its strength to weight ratio and its ability to withstand the repeated impact of the buffer system cycling with every shot. Its 6-position design allows a stock to be adjusted across a standard mil-spec range of lengths to fit different shooters and different levels of gear. Finished in black it matches the look of most mil-spec AR builds without drawing attention to itself. A durable finish on the tube resists the wear that comes from frequent stock adjustment and field use. This kit includes everything needed for installation beyond the tube itself: the buffer spring locking ring and castle nut. Having the complete hardware set in one package saves a builder from tracking down individual parts from multiple sources. Built to fit the AR-15 platform this buffer tube is compatible with the wide range of mil-spec stocks available on the market. Builders assembling a new lower or replacing a worn or damaged tube will find this a complete straightforward solution. CMC Triggers Buffer Tube Specifications Manufacturer: CMC Triggers Model: Buffer Tube Compatible Hosts: AR-15 Color: Black Material: 7075 Aluminum Includes: Tube Spring Locking Ring Castle Nut Available At: GrabAGun