This BECK DEFENSE receiver set is machined out of solid 7075-T6 aluminum billet. This outstanding stripped upper and lower receiver set are just begging to be finished out with your favorite parts or personal touch. Hand matched to ensure you get a correct solid fit between the upper and lower reciever. BECK DEFENSE only uses the highest quality parts for all our products, and of course everything is made in the USA by American hands.. Note: This is considered a firearm and are required by federal law to be shipped to an Federal Firearm License (FFL) holder near you. If you require help finding an FFL holder please do not hesitate to contact us.