AR15 Upper Receiver Parts List:

• Forward Assist Assembly
• Bolt Assembly
• Ejection Port Cover Assembly
• Charging Handle Assembly
• Bolt Carrier Assembly
• Rear Sight Assembly (in handle)

AR15 Top Half

• AR15 Barrels
• Upper Receiver
• Bolt Carrier
• Charging Handle
• Gas Block / Front Sight Base (FSB)
• AR15 Muzzle Devices
• Handguards
• Rear Sights