Nice upper with a catch… - Aero Precision M4E1 223 Remington/5.56 NATO Enhanced Upper Receiver

The upper itself is fantastic, where it fails in my opinion is the handguard options. The only compatible handguards that Aero sells are huge. If your hands are similar to Shaqs, you should be good. If you are use to one handing 2 liter coke bottles you’ll love their handguards. If you don’t fall under the above two categories, get the standard threaded upper from Aero.