C-10 Billet AR-10 Upper Receiver Manufacturer: New Frontier ArmoryModel: C-10 Billet AR-10 Upper Receiver Caliber: Multi (will accept any caliber designed for the AR-10 platform) Other Specifications and Features of the C-10 Billet AR-10 Upper Receiver: DPMS Low Rail Height Spec Matte black hard-coat anodized per Mil 8625 Type 3 Class 2 Compatible with all standard DPMS .308 components and most aftermarket parts - Machined pocket to accommodate Magpul BAD Lever Manufactured to MILSPEC on state of the art CNC equipment for consistent quality parts and exacting tolerances Save money by building your own AR-10 rifle from the ground up exactly the way you want it configured Designed to match lines with New Frontier Armory C-10 Billet Lower and most other DPMS pattern AR-10 / .308 lowers Accepts any MILSPEC .308 dust cover and forward assist New pictures coming soon!! Product may differ slightly**NOTE: Some rail systems that use anti-rotation tabs may need slight modification to fit this upper. It is designed for flush mounting rails and standard hand guards.The New Frontier Armory C-10 Billet AR-10 Upper Receiver is proudly MADE IN THE USA by hard working American men and women.