Wilson Combat Upper Receiver 5.56x45mm NATO AR-15 Billet Anodized Black. These AR15 Upper Receivers have been machined for maximum durability and given a hard coat anodized in rugged black. The Wilson Combat Upper Receiver is a must have for any AR-15 build. Specifications for Wilson Combat Upper Receiver: Manufacturer: Wilson Combat Color: Black Finish: Anodize Fabric/Material: Aluminum Gun Make: AR Platform Gun Model: AR-15 Condition: New Features of Wilson Combat Upper Receiver 7075-T6 forgings machined to Mil-Spec Plus tolerances Mil-Spec type 3 hardcoat anodize finish Mil-Spec Forged Upper Receiver with Picatinny top accessory/optic rail M4 style feedramps Stripped-No forward assist or ejection port cover installed Approximate weight 7.0 Oz. Forging Stamp May Vary Package Contents: Wilson Combat Upper Receiver What firearm models does the manufacturer say Wilson Combat Upper Receiver is compatible with? The manufacturer suggests that Wilson Combat Upper Receiver is compatible with AR-15Wilson Combat TR-UPPER-BIL-A: Upper Receiver 5.56x45mm NATO AR-15 Billet Anodized Black