Guntec USA AR .308 Gen 2 Stripped Billet Upper Receiver Bronze. We take extra pride in our ability to produce quality upper receivers that perform to the level our customers expect. This Gen 2 billet upper is a completely new design that has been precision machined from T6 6061 aluminum. We offer this upper in both long and short versions that both feature a flat top to accommodate most sighting configurations. The long version features a round barrel with the .308 cal ejection port door and a forward assist block that has a set screw to lock it into position. The short version has a round barrel with the DPMS spec rail height. Specifications for Guntec USA AR .308 Gen 2 Stripped Billet Upper Receiver: Manufacturer: Guntec USA Caliber: .308 Winchester Gun Make: AR Platform Condition: New Features of Guntec USA AR .308 Gen 2 Stripped Billet Upper Receiver New design allows forward assist to function. MIL-A-8625 TYPE III anodizing. Slim design with smaller profile shell deflector. 1913 Picatinny Rail flat Top-DPMS low spec rail height. Will match up with any brand lower receiver. Accepts Mil-Spec .308 Cal ejection port door kit and forward assist kit (not included). Package Contents: Guntec USA AR .308 Gen 2 Stripped Billet Upper Receiver What firearm models does the manufacturer say Guntec USA AR .308 Gen 2 Stripped Billet Upper Receiver is compatible with? The manufacturer suggests that Guntec USA AR .308 Gen 2 Stripped Billet Upper Receiver is compatible with AR308 AR-10Guntec USA GT-UPPER-308-G2-BRZ: AR .308 Gen 2 Stripped Billet Upper Receiver Bronze