Luth-AR Stripped NC15 Forged Upper Receiver, Manufactured from 7075-T6 Aluminum, Hard-Coat Anodized, Features Upper Picatinny Rail for Mounting Optics and Accessories FTT-EA Luth-AR stripped .223 Remington receivers are A3 flattop with M4-type feed ramp" 12 position Picatinny accessory rail for mounting scopes or flip-up sights. Shell deflector" forward assist housing" and ready for an ejection port cover. Precision machined from a 7075-T6 aluminum forging and hardcoat anodized for a tough" scratch-resistant coating.