Product Summary
The Daniel Defense Big Hole Flat Top AR-15 Upper Receiver is engineered for compatibility with early Colt lowers featuring .315 front pin holes. Constructed from high-quality 7075-T6 aluminum with a Mil-Spec Type III hard coat anodized finish, this upper ensures long-lasting durability for 5.56x45mm NATO and .223 Remington calibers. It features integrated M4 feed ramps, T-Marks, a forward assist, and a laser-engraved DD logo on the left side. By utilizing the included .315 push pin with a ball detent, users can enjoy a much faster and easier assembly and disassembly process compared to traditional offset pins.
