Ballistic Advantage Enhanced Upper Receiver AR-15 Black. Forged from 7075-T6 aluminum this assembled upper is precision machined to mil-spec M16/M4 specifications and features M4 feedramps. Specifications for Ballistic Advantage AR-15 Enhanced Upper Receiver: Manufacturer: Ballistic Advantage Color: Black Finish: Anodized Fabric/Material: 7075-T6 Aluminum Caliber: Universal Gun Make: AR Platform Gun Model: AR-15 Condition: New Hand: Right Country of Origin: USA Features of Ballistic Advantage AR-15 Enhanced Upper Receiver Threaded Forward Assist Roll Pin - Allows for simple installation of the forward assist and eliminates the chance to damage the finish during installation M4 Feedramps .250 takedown pin holes Lazer engraved T-marks Ballistic Advantage branded AR15 Assembled Upper Receiver in Anodized Black New enhanced forging that gives the upper receiver a "billet look" New Picatinny profile that blends seamlessly with our Enhanced Lowers. Package Contents: Ballistic Advantage AR-15 Enhanced Upper Receiver Threaded Forward Assist Roll Pin Port Door Or Forward Assist What firearm models does the manufacturer say Ballistic Advantage AR-15 Enhanced Upper Receiver is compatible with? The manufacturer suggests that Ballistic Advantage AR-15 Enhanced Upper Receiver is compatible with AR-15Ballistic Advantage BAPA100084: Enhanced Upper Receiver AR-15 Black