The Rock River Arms AR-15 A2 Upper Receiver is a great choice for a retro AR-15 build. This assembled upper comes standard with a shell deflector, dust cover and A2 carry handle design. The Rock River Arms upper receiver is ready to be installed onto any mil-spec AR-15 lower. The receiver is forged from aluminum to military specifications and then Type III hard coat anodized. Whether at the range or in the field, the high quality Rock River Arms upper receiver looks great for a retro AR-15!FeaturesSolid forged constructionStrong, and consistent performancePrecise drop-in fit onto any mil-spec AR-15 lower