I got an AUG M1 with 3x optic a few weeks ago. I have noticed that the barrel has a slight wiggle in the reciever (not the stock). Also, I get groups that range from just over an inch, to 4 inches at 100 yards off of a rest. Not very consistant, in my opinion. Could any of you chime in on this? Some say it is normal, some say it is not.