APF firearms are made in America's heartland by craftsmen passionate about firearms, the outdoors, and supporting our nation's law enforcement agencies. Whether in the field or on the range, APF builds the caliber you want and offers an array of unique finishes and accessories to bring you the perfect upper receiver for your next rifle. Features 416SST Barrel 15" MLOK Handguard Nickel Boron BCG Billet Upper Receiver Product #: 683401 Manufacturer #: UP1073 UPC #: 691835687018