Aero Precisions stripped M5 Upper Receiver is made out of forged 7075-T6 aluminum and is a great fit for your 308 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. M4 Feedramps .2795 takedown pin holes (DPMS size) Laser engraved T-marks Stripped Mfg: Aero Precision