Luth-AR AR-15 A1 Stripped Upper Receiver w/ M4 Feed Ramp Black. This 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 is ready for adjustable rear sight. The upper has a shell deflector and forward assist housing and will accept a standard dust cover. The C7 style carry handle allows mounting a scope.. This upper has an M4 feed ramp . Use with any Mil-Spec lower receiver. Specifications for Luth-AR AR-15 A1 Stripped Upper Receiver w/ M4 Feed Ramp: Manufacturer: Luth-AR Color: Black Finish: Hard-Coat Anodized Fabric/Material: 7075-T6 Aluminum Caliber: 5.56x45mm NATO Gun Model: AR-15 Additional Features: A1/C7 Style Included Accessories: M4 Feed Ramp Condition: New Features of Luth-AR AR-15 A1 Stripped Upper Receiver w/ M4 Feed Ramp Forged from 7075-T6 aluminum Hardcoat anodized finish Shell deflector and forward assist housing A1/C7 style carry handle M4 Feed Ramp Compatible with Mil-Spec AR15 lower receivers Package Contents: Luth-AR AR-15 A1 Stripped Upper Receiver w/ M4 Feed Ramp What firearm models does the manufacturer say Luth-AR AR-15 A1 Stripped Upper Receiver w/ M4 Feed Ramp is compatible with? The manufacturer suggests that Luth-AR AR-15 A1 Stripped Upper Receiver w/ M4 Feed Ramp is compatible with AR-15Luth-AR UR-01-E3-M4: AR-15 A1 Stripped Upper Receiver w/ M4 Feed Ramp Black