Rainier Arms Forged Mil-Spec Upper Receiver

Rainier Arms Forged Mil-Spec Upper Receiver Rainier Arms flattop upper receiver is carefully machined to mil-spec to serve as a great foundation for a quality AR rifle. Features: Made from 7075 - T6 aluminum Type III hard coat anodized Matte black finish Dry lube coating: Inside to reduce wear and adds lubricity "T - Marked" engraved Upper parts kit included M4 Feed Ramp