Forged from 7075-T6 aluminum, the Aero Precision M5 308 Upper Receiver is a great platform for a big-bore AR build. Precision machined to Aero Precision's specifications, the upper features M4 feedramps and a matte black hard coat anodized Mil 8625 Type 3 Class 2 finish. DPMS pattern takedown holes (.2795") allows for compatibility with a wide range of lower receivers. Receiver is compatible with standard DPMS pattern 308 components, including lowers, bolt carriers, charging handles and barrels. Comes with forward assist and ejection port cover installed. Works with DPMS high profile handguards. Mfg: Aero Precision SPECS: Fits - DPMS pattern 308 parts, including barrel, bolt carrier, charging handle and lower. Weight 14.1 oz.