The spring goes on the lower spot. Your gun will not function on the higher spot.
You might try and put a few hundred more rounds through it and see if needs breaking in. You might also want to try some more potent rounds.
You should pay close attention to wich mags are in it when it jams. You either have a mag problem or a spring not yet broke in problem.
Last edited by Colorado Luckydog; 03-06-2011 at 06:09 AM.