Rene, I did that back to back mag dump of 660 with an old Bushmaster AR. It ran flawlessly the entire time. Needed a serious cleaning after, but fired the entire 22 magazines without a stoppage.
A wyo AR ought to have a proportionally better reliability equal to the price difference. Oughta shoot sub quarter MOA for 5k rounds fired as fast as the shooter can regain sight picture. Belay that last, shooter should never lose sight picture. Whaddyathink?
I could run about 6 or 700 rds thru a colt m4 before it would puke. And need about 5 or 10 mins of very basic cleaning to get it running again. Cleaning was after hosing it down with clp and working the bolt back and forth to loosen up carbon. Most of it was bolt shoulder cleaning and carrier recess are for bolt shoulder. Build up in those areas cause alot of failure to chamber, failure to extract, and double feed and bolt overides Could run about 400 550 thru a A2 A1 about 400
