Now you can legally build one of these popular semi-automatic rifles with a US made receiver and a surplus parts kit. Full assembly instructions are provided, including what parts need to be changed to stay legal. Both stamped and forged receivers are covered in this easy to follow video. 91 minutes. Summary of Material: Do you want to build a legal G-3, 7.62 NATO (.308) semi-auto rifle? International Firearms Expert John D. Bush takes you step by step through the process of building an ATF approved G-3 semi-auto rifle using a new USA manufactured receiver and surplus parts. Includes what parts you need to change to stay legal! Detailed coverage of the barreling process, headspacing, parts identification and inspection, and everything else you need to know. Both the Stamped Steel and Forged Aluminum Receivers are shown and demonstrated.