The M5 .308 Stripped Upper Receiver is the perfect upper for your big bore rifle build. Forged from 7075- T6 aluminum, this stripped upper is precision machined to accept standard .308 components. Match this with our M5 .308 lower receiver for a solid and dependable fit. Made In America? Yes Platform M5 Material Machined from 7075-T6 forged aluminum Select Your Finish Anodized Black Compatibility Accepts standard DPMS .308 components Weight(s) 12.7 oz Other Barrel nut threads: 1 7/16"-16