By pressing out the pins on your ar you can transform it into. If you are thinking about building an ar chambered in.308 winchester, consider the aero precision m5e1 upper complete. An ar10 upper receiver is the top part of the rifle that houses the barrel, bolt carrier group, forward assist, and charging handle.
Bolt Action AR10 Uintah Precision UPR10 in 6.5 Creedmoor Ultimate
It is responsible for ejecting the spent cartridge and.
