The Yankee Hill Flat Top Upper Receiver is a high-quality, stripped component precision-forged from 7075-T6 aluminum. Finished in a durable black anodized hardcoat, this 5.56x45mm NATO compatible receiver features M4 style feed ramps and laser-engraved T markings for consistent accessory placement. The interior is coated with a dry film lube to ensure smooth operation of the bolt carrier group. Weighing only 6.97 oz, this AR-15 upper is designed to fit standard Mil-Spec lower receivers and accepts all standard upper replacement parts, including dust covers and forward assists.