Just got it a few days ago (its a non-comp shorty), apparently the guy bought it in '89 or somesuch and has never even played with it. It seemed to need some cleaning, but the co2 loaded and it fired fine.
well, i managed to take it apart and put it back together again, though i couldn't remove anything from the upper barrel (punching pin and housing), i tried lightly hammering it out but it looks like it gets caught on the threading of the co2 cap.
I put it all together again, and now it's leaking all at once from the top barrel out of the set screws

I'm about to take it apart again but im afraid i won't even know what to look for.
Anyone know where to get o-rings for one of these (if that's the problem)? if not from the internets, then does anyone know what sizes from the hardware store?
I really hope i didn't screw up too badly, it's such a nice looking marker.