Have any of you folks done this? If so, what was it like? I'm sure it was fun, a blast,etc., but I am curious about stuff like: *Accuracy at short range (25 yards) *Recoil - worse or better than the standard .223? About the same? *Quality of the gun you used. Any jamming? I understand that Olympic Arms makes the .45 cal version of the AR-15. Does anyone else? What's your first-hand experience with the quality of these guns? Thanks in advance for all helpful replies.