APF 5.56 Nato Carbine 2.0 Complete Upper Receiver Armor Black. 56 Nato Carbine 2.0 Complete Upper Receiver. Developed using some of the most extremely robust and dependable substances around these AR15 Upper Receivers via APF offers you something that will give a great deal of stability. APF has been developing high quality products for a very long time and the APF 5.56 Nato Carbine 2.0 Complete Upper Receiver is their manner of revealing exactly how much they care. At OpticsPlanet we make it our obligation to obtain the most suitable solution for your specifications and showcasing the APF 5.56 Nato Carbine 2.0 Complete Upper Receiver is one thing that we are delighted to offer. Specifications for APF 5.56 Nato Carbine 2.0 Complete Upper Receiver: Manufacturer: APF Caliber: 5.56x45mm NATO Color: Black Fabric/Material: Aluminum Gun Type: Rifle Package Contents: APF 5.56 Nato Carbine 2.0 Complete Upper Receiver APF UP1059: 5.56 Nato Carbine 2.0 Complete Upper Receiver Armor Black