The Ballistic Advantage BA10 AR-10 Upper Receiver is forged from 7075-T6 aluminum and precision machined to DPMS Gen1 specifications, anodized black finish and features M4 feedramps. Comes assembled with Forward Assist and Ejection Door installed. Precision machined to accept standard .308 components. DPMS High Profile (.210) Tang). Has Laser engraved T-marks.