Fostech FLITE Elite Stripped Upper Reciever Tungsten. These uppers weigh in at only 4.92 ounces. Compare this to a standard Aluminum stripped upper at 6.92 ounces and you have a nearly 30percent weight reduction. Specifications for Fostech FLITE Elite Stripped Upper Reciever: Manufacturer: Fostech Color: Tungsten Finish: Magnesium Alloy Fabric/Material: Lite Alloy Gun Make: AR Platform Gun Model: AR-15 Condition: New Features of Fostech FLITE Elite Stripped Upper Reciever Lightweight Package Contents: Fostech FLITE Elite Stripped Upper Reciever What firearm models does the manufacturer say Fostech FLITE Elite Stripped Upper Reciever is compatible with? The manufacturer suggests that Fostech FLITE Elite Stripped Upper Reciever is compatible with AR-15Fostech 6880-TUN: FLITE Elite Stripped Upper Reciever Tungsten