Been mostly good for 500 rounds - Aero Precision M4E1 AR-15 10.5in 5.56 Rifle Barrel Complete Upper Receiver with Flash Hider

Handguard geels great. Much wider than my other psa slim line handguard so feels like much more of a solid grip. Lightweight and looks great. First range trip(100rounds) had 2 failures to feed a new round but that has since gone away. Been running smooth ever since. Dropped right on top of my m4e1 enhanced lower and fit good.