Aero precision m4e1 threaded assembled upper receiver - Aero Precision M4E1 Threaded Assembled Upper Receiver

TLDR: Aero makes a great upper for a great price. Perfect for Aero builds or beginners. Will definitely buy and use again.

I bought two Aero Precision M4E1 Threaded Assembled Upper Receivers for two new builds. They are great upper receivers for the price especially when on sale. Having them come pre-assembled is a plus and speeds up the build process a bit. I wish the tolerances were a bit tighter but they are definitely in spec. BCM, Zev, Radian and Noveske spoiled me a bit as I am use to heating up the threads to get the barrel in but for a budget builds or if you are a first time builder this may be a plus. I built a 10.5" and 11.5" aero uppers for a M4E1 lower. Both uppers came out great. Wasn't sure what barrel length to go with so I did both. This was my first time making pistol builds and I have the frame of mind that you should always start with aero and move up from there when building rifles. Aero makes great parts for a great price and I would never go lower in quality when it comes to building my own rifle. I am now thinking of building a 11.5" Geissele next since these turned out great. I prefer the 11.5" over the 10.5". If you need a good upper for a good price then don't hesitate to buy this one. I know it won't be my last time buying one.