[99BPS]

Hey so I just gassed up my mag for the third time scinse reentering the sport from a several year absence. It gassed up fine, but randomly while shooting there would be a slight leak from the back of the valve. I broke it down and oiled it and had the same problem. It's shooting fine, aside from velocity problems that are actually more to do with the paint (first time I filled the hopper the entire fill rolled out onto the floor).

The barrel is way overbore but I don't have bigger paint or a smaller barrel for it, so I have no way of knowing if the inconsistent velocity is normal with the paint (which is also inconsistent) I didn't find problems in the valve. Can anyone call my attention to certain orings I would want to check?

Please and thanks.

[warchild69]

Sounds like the spring pack or reg seal is shot, order a rebuild kit, that should do it, if not the spring pack may need replaced too. Good luck and welcome back from your "vacation" from the sport.

[DMex]

It's not your spring pack.

A leak out the velocity hole is a reg piston issue. Could be something as simple as a bad piston oring or having your velocity turned up too high. They are designed to vent.

Bring the velocity down a llittle and it should go away. If it's a constant leak no mater what way you turn the velocity knob then it's def an oring.

As for your roll out issue. You're probably using very small paint or your detents are worn/missing on your barrel.

[99BPS]

Originally Posted by DMex

It's not your spring pack.

A leak out the velocity hole is a reg piston issue. Could be something as simple as a bad piston oring or having your velocity turned up too high. They are designed to vent.

Bring the velocity down a llittle and it should go away. If it's a constant leak no mater what way you turn the velocity knob then it's def an oring.

As for your roll out issue. You're probably using very small paint or your detents are worn/missing on your barrel.

It was very small paint, thats what I said was the issue.

It was venting, I didn't even think of that. I was using Co2 instead of HPA and didn't adjust before hand. Thanks a lot!
I need a smaller barrel.

[DMex]

Originally Posted by 99BPS

It was very small paint, thats what I said was the issue.

It was venting, I didn't even think of that. I was using Co2 instead of HPA and didn't adjust before hand. Thanks a lot!
I need a smaller barrel.

Did you already chrono it? If you can't get it up to the desired FPS before it leaks then you very well might have a bad piston.

[DMex]

Also, you can push those barrel nubbins further in the barrel and stop the roll outs (if they're the plastic type). Get a piece of black tape and run it around the back of the nubbin area where it protrudes through the barrel You need to run it tight around the barrel so it will push them further in.

[99BPS]

A smaller barrel would prolly help more, but thats not a bad idea either thanks!

Already chroned, it was shooting WAY hot at first. Shooting 300fps +/- 5 now with no leak, thanks much!