Fortis Manufacturing Billet Upper Receiver Stripped Black. Like our other products we designed this upper with function as well as form in mind. We shaved off the ounces where we could without sacrificing rigidity or strength. The end result is increased function and performance with the design aesthetics that we're known for. See for yourself and you'll see and feel the difference with our products. Specifications for Fortis Manufacturing Billet Upper Receiver Stripped: Manufacturer: Fortis Manufacturing Color: Black Finish: Anodized Fabric/Material: Aluminum Gun Make: AR Platform Gun Model: AR-15 Hand: Ambidextrous Features of Fortis Manufacturing Billet Upper Receiver Stripped One Piece Billet Design Aircraft Grade 7075 T6 aluminum Military Specification Type III Hard Coat Anodized M4 feed ramp Engraved logos on both sides as well as the top No Forward Assist 1913 picatinny rail flat top Light weight at 6.54 oz Package Contents: Fortis Manufacturing Billet Upper Receiver Stripped What firearm models does the manufacturer say Fortis Manufacturing Billet Upper Receiver Stripped is compatible with? The manufacturer says that Fortis Manufacturing Billet Upper Receiver Stripped is compatible with AR-15Fortis Manufacturing U-Billet-M4-NOFA: Billet Upper Receiver Stripped Black