The AR-STONER Stripped AR-15 Billet Upper Receiver is a great choice for your next AR-15 Build. Machined from 6061-T6 aluminum, this durable upper receiver will perform in any environment. Featuring a sleek, aesthetically pleasing profile, this A3 flat top is ready for further customization with your choice of an optic, or front and rear sights. Once assembled, this upper fits precisely onto any standard lower receiver. Give your next AR-15 great looks and function with the AR-STONER Stripped AR-15 Billet Upper Receiver.FeaturesLeft handed ejectionMachined From Solid 6061-T6 AluminumType III Anodized/CerakotePrecise Drop-In FitModern Sleek Design