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SKU: GAG_GSS-ATIHUP200-275435
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