Matched billet upper and lower receiver set. Made from 7075 T6 Aluminum with a black type 3 hard coat anodized finish. - Caliber: .308 - Upper Receiver Type: Flattop - Upper Receiver Material: Forged Aircraft 7075 T6 Aluminum - Upper Receiver Features: Brass Deflector - Upper Receiver Coating: Anodized to Mil-Spec - Lower Receiver Material: Forged Aircraft 7075 T6 Aluminum - Lower Receiver Features: Billet Winter Trigger Guard - Lower Receiver Coating: Anodized to Mil-Spec