Developed with attention to component fit and workflow efficiency, the Luth-Ar Llc M16 A1 5.56 NATO Assembled Upper Receiver Black supports smooth handling and consistent mechanical behavior. Ideal for range training and recreational shooting, this upper receiver is a testament to Luth-Ar's engineering excellence and historical significance. Key Features: Manufacturer: Luth-Ar Llc, Model: M16 A1, Caliber: 5.56 NATO, Condition: New, Action: Semi-Automatic, Finish Color: Black, Barrel Length: N/A, Number of Magazines: N/A, Capacity: N/A, Optic Footprint: N/A, Unique Features: Black hardcoat anodized, 7075-T6 forging, forward assist lug, no deflector, no M4 feed ramps, Night Sights: No, External Safety: No, Threaded Barrel: No, What's In The Box: A1 rear sight assembly, A1 port door cover assembly, teardrop forward assist assembly, Weight: N/A, Length: N/A, Width: N/A.