Not trying to beat a dead horse, but want to echo Nate's experiences. I recently had a type 3 gas system installed on my Micro at RobArms. First off, it functions flawlessly now and couldn't be happier with the reliability.
With the gas setting on zero, it does not cycle the action, unsuppressed. However, with a Saker 556K attached, it cycles the action everytime, even on the zero setting. Disappointing, because if you want to run it like a bolt action, it makes since to do so even more so when the can is attached.
I tore down the gas system after seeing this thread and my gas regulator holes are not aligned, just like Nate's.
It bugs me that RobArms has told several people now, including myself, that it's "normal" for the action to cycle on zero, when their own manual pretty clearly states otherwise. Have tried contacting them for a replacement that has properly aligned gas ports but have yet to receive a response. In the mean time, at least I have a functioning firearm.