930 jm pro

[Pistolpete9]

I simply cleaned the piston and gas rings really well (amazing amount of crud in there) and it went straight back to working.  There was very little carbon/gunk on the tube itself.  I am likely going to go ahead and get the spacer tube as well as their follower and am still planning on putting the 10/22 spring in, but all of that is simply to have a little extra cushion.  The gun has shown that as long as the piston system is clean it will run.  Not too much to ask really since I could likely leave just about every other part untouched for long periods of time and cleaning the piston takes very little time ( love that it's chromed).  Thanks for the heads up though on the spacer tube.