I bought an Etek 4 off a guy a few days ago. The gun looked to be in mint condition (like he said) but when I took the bolt and ram out, this is what was greeting me.
So it's pretty obvious that he put the bolt pin in front of the ram and shot it a few times because it's a mess in the ram housing. I can't even take out the exhaust valve, because it's so dinged up that it won't slide out so it's stuck in there as far as I know.
When I air it up it leaks pretty heavily from the solenoid aswell (which I assume is because of a bad seal in the ram).