Description
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
