Luth-AR A2 Upper Receiver, Upper, 223 Remington, 556NATO, Black, AR15, Anodized UR-A2-A The LUTH AR assembled A2 upper receiver features the A2 carry handle style" complete with A2 rear sight (windage and elevation). Features shell deflector" forward assist" and an ejection port cover. Precision machined from a premium-grade 7075 T6 aluminum forging and hardcoat anodized for extra strength" with a tough" scratch-resistant Teflon coating.