Luth-AR AR-15 A1 Upper Receiver Assembled Black. Start your project with our complete A1 upper receiver. Comes with the standard features of a Mil-Spec upper receiver and is forged from 7075-T6 aluminum with a hard coat anodized tough finish. The A1 carry handle includes A1 adjustable rear sight and perfect for building a retro M16A1E1 M16A2 Carbine Model 723 or a Model 733 Commando. The upper has a shell deflector and tear drop forward assist and dust cover. The C7 style carry handle allows mounting a scope from the era for a retro look. This upper does not have M4 feed ramps in keeping with the military A1 uppers. Use with any Mil-Spec lower receiver. Specifications for Luth-AR AR-15 A1 Upper Receiver Assembled: Manufacturer: Luth-AR Color: Black Finish: Hard-Coat Anodized Fabric/Material: 7075-T6 Aluminum Caliber: 5.56x45mm NATO Gun Model: AR-15 Additional Features: C7 Style Condition: New Last Chance: Yes Features of Luth-AR AR-15 A1 Upper Receiver Assembled A1 rear base sight assembly (UR-21A) Ejection port cover assembly (UR-05A) Teardrop forward assist assembly (UR-08T) 7075 T-6 Aluminum Hard coat Anodized Has forward assist and Brass deflector C7 Style Package Contents: Luth-AR AR-15 A1 Upper Receiver Assembled What firearm models does the manufacturer say Luth-AR AR-15 A1 Upper Receiver Assembled is compatible with? The manufacturer says that Luth-AR AR-15 A1 Upper Receiver Assembled is compatible with AR-15Luth-AR UR-01A: AR-15 A1 Upper Receiver Assembled Black