Fwiw I think the PSA bundle is not the nato version, steyr has special black magazines for 300 blk that work with the regular waffle mag well.
I haven't paid too much attention to the new aug other than having the video on in the background while I was doing something else. From what I remember the top rail looked nice, but I'd want to make sure I could still access the gas block for suppressed shooting and didn't lose the quick change barrel option (they might have addressed this in the james reeves video but I wasn't paying super close attention)