Aero m4e1 upper - Aero Precision M4E1 AR-15 Threaded Stripped Upper Receiver

Fit and finish was what one would expect from Aero Precision, this upper and lower from the same company complamented the build. It shots lights out and look just as good as it shoots. Love the the fact that there's no pins to knock in. They were replaced by screws. Which saves you from hammering away with a punch on the upper and lower and possibly damaging them.