Results are in!
The only gun to finish the match malfunction free was a G17 purchased used by the current owner.
Rather than cross-post a bunch of information, I'm just going to provide a link to the results. I will be updating the results as I continue to sift through the data collected at the match, so you'll want to check it from time to time.
So You Have a Flawless Running Semi-Auto? IISHOT1000 2009 - TheFiringLine Forums