The ATI AR15 Upper Receiver is a lightweight polymer receiver that accepts standard mil-spec parts. It is compatible with several calibers such as 5.56 NATO, .300 Blackout, .22LR, 6.8 SPC, and many more. Get one today at the best price online from GrabAGun!
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AR15 Upper Receiver
AR15 Upper Receiver Features Accepts standard mil-spec parts. Patented Metal-reinforced polymer upper receiver. Lightweight with durability of a forged aluminum upper. Metal insert to reinforce critical areas of the upper. Only 1/2 a pound! (7 ounces). AR15 Upper Receiver Specifications Multi-Caliber: 5.56mm, 300BLK, 22LR, 6.8 SPC and others Material: Polymer w/Insert