These uppers were designed and are MACHINED 100% IN HOUSE - Made from 7075-T6 aluminum (Billet) - M4 Style feed ramps - Inside coated with dry film lube - Accepts Standard upper receiver parts (dust covers forward assists etc.) - Accepts Mil-Spec Lower receivers - Fit and function with your standard lower receiver. - Hardcoat Anodized matte black to Military Specifications or better - YHM is proud to offer our Second Billet Upper Receiver. The stylization of the this upper receiver is reminiscent of our SLR handguards. Because we were working with Billet 7075-T6 Aluminum it gave us the ability to really create an eye catching upper receiver.
Determined at checkout.