The standard - Aero Precision M5E1 .308 Enhanced Upper Receiver

Rate at 4.75. The aero precision enhanced upper is the standard for the A.R. 10. Excellent quality and craftsmanship. Truly wonderful fit. Lots of options when it comes to most of the parts. The only reason I don’t give a five out of five is your limited on your hand guard. The enhanced gives a true free float barrel however there’s not a large selection of hand guards that will attach to this upper receiver. Otherwise I couldn’t be happier with this high-quality product. Definitely would recommend. I have built more than one using this upper.