Help: Small leak down Barrel

[SlyIdeas]

I have an old school automag rt that I bought used not to long ago and for some reason I can't get the thing to stop leaking. I bought an RT parts kit and that did a number for it but it still has a small leak running out of the bolt and down the barrel. This leak is very slow but annoying none the less. The RT has a level 10 in it with two shims and the smallest carrier, the next size up was leaking. I know it isn't a shim issue because I have completely removed them and it still does it. I also read on another thread that it could be the position of the valve but that also doesn't seem to be working for me because I have tightened down the banjo bolt all the way without luck. Any help is appreciated! One last simple question. Is the gun supposed to vent a little air out the back when you fire, or do I need to be looking into a new reg piston setup? Thanks!

[Dayspring]

Start the Level 10 setup over again with a new oring. That's the problem with running the smallest carrier. You can't tighten it up anymore if it leaks.

And the black dot means you posted in that thread.

[SlyIdeas]

Alright so lets say that the problem is in the oring itself. Is the gun supposed to vent out the back a little when fired or is there a problem with that? Thank you for the help.

[Dayspring]

The leak out the back is the gun venting from too much pressure. (If you turn the velocity up to high.)

It may be that you need a newer reg piston. There are a new batch that is set to the higher operating pressures of the level 10.

But as for the leak, if it's leaking on the 0 carrier, you have to start over.