Aero precision ar-15 assembled upper receiver - Aero Precision AR-15 Assembled Upper Receiver

I have been on a upper building spree as of late and I found that the Aero Precision AR-15 Assembled Upper Receiver is great for getting the job done. Not needing to install a dust cover or forward assist really speeds up the process. I've used a half dozen of these on the uppers I built and overall they work the best in my opinion. You get a quality forged assembled upper for a pretty decent price. I do like the M4E1 version also but it is rarely in stock here and they go fast. The standard A3 flat top version is perfect for any upper build and I highly recommend it. I haven't had a bad experience with them yet so I will keep buying them as long as they are in stock.