Centurion Arms C4 5.56 Billet AR-15 Upper Receiver

The Centurion Arms C4 Billet AR-15 Upper Receiver is designed to be used with the C4 Billet Lower. It is machined from a solid block of 7075-T6 aluminum and is Type III Class 2 hardcoat anodized black to military standards. It features a flat top picatinny rail and is compatible with standard upper parts. M4 feed ramps correspond with the feed ramps on your barrel extension to aid in reliability. The C4 stripped Billet AR-15 Upper Receiver is what you need for your next build. Features: CNC machined from 7075-T6 aluminum Hardcoat anodized black Compatible with Mil-Spec parts M4 feed ramps Picatinny top rail