For any rifle shooter, the Wilson Combat billet AR-15 upper and lower receiver set is a premier selection. Expertly constructed from 7075-T6 aluminum with CNC machining, this exquisite design boasts strength and durability. An over-sized magazine well allows for faster reloads, and the set is anodized for superior corrosion and wear resistance. For the serious shooter looking for precision without sacrifice, this Wilson Combat billet AR-15 upper and lower receiver set is a perfect choice. AR-15 Upper/Lower Receiver Billet CNC machined aircraft grade 7075-T6 aluminum Oversize, EDM machined magwell for fast, smooth reloading Picatinny top rail M4-style extended feed ramps for excellent reliability with a wide variety of calibers Precision threaded receiver and reamed pin holes Hex screw bolt catch retention Black armory tuff finish