Spike's Tactical specializes in AR platform firearms and components. Their outstanding quality control and attention to detail results in an excellent product while staying budget friendly for the average shooter. When you are planning your next AR-15 build from scratch, Spike's assembled flat top upper receiver should be at the top of your parts list. Each receiver comes with the ejection port door and forward assist already installed to save you time. The mil-spec M4 upper is forged from 7075-T6 aluminum and features a small Spike's Tactical logo at the rear of the picatinny rail. It also has T markings to assist with mounting optics and gives you a point of reference for reinstalling your scope or red dot if you need to remove it from the firearm. If you're looking for a solid upper receiver to complete a build, you can't go wrong with Spike's M4 flat top.
 
Features and Specifications:
Manufacturer Number: SFT50M4
Spike's Tactical AR-15 Upper Receiver
Assembled w/Ejection Port Door & Forward Assist
Receiver Style: Mil-Spec M4 Flat Top
Receiver Material: Forged 7075-T6 Aluminum
T-Marked Rail
Spike's Tactical Logo
Color: Black