The main problem I had with mine, was Failure To Feed. Mine too was getting hung up on the feed ramp, no matter what kind of ammunition I tried or what magazine (surplus, aftermarket or factory) I used. I compared the AO receiver feed ramps to my Rockola and found The AO to be narrower (not as close to the edges) and at a steeper angle. So out came the rotary tool on my brand new rifle and reshaped the ramps. It now feeds with no issues 99% of the time, the other 1% it doesn't strip a round from the mag.; but it only happens with my cheap aftermarket mags. I've stretched the springs and they are better.
The other issue was that I couldn't get the barrel band tight and the hand guard would slide around (forward and backwards), but a shim under the band fixed this.
The mag does not go into the well very easily either, but after inserting and removing a ton of time it's getting better.
Should I need to do this for a $875.00 rifle? Definetly not.
Do I regret buying this gun? Definetly not.