Spike's Tactical M4 Flat Top Upper Receiver

The Spike's Tactical® M4 Flat Top Upper Receiver is perfect to have on hand for your next rifle build or as a backup part for your favorite rifle. This Mil-Spec upper receiver is constructed with 7075-T6 aluminum and features a corrosion-resistant anodized finish. T-Marks on the top Picatinny rail make mounting optics and iron sights easy. This upper receiver comes with the forward assist and ejection port door installed. Backed by a lifetime warranty. Made in USA.