Help! Runaway RT valve with leak...

[coyote]

I traded away and RT'ed minimag.

The new owner has a problem with it. When the air system is put in place he has a serious valve leak, and the RT aparently takes off on its own.

My thoughts are the On off pin, or the on off oring. Any other thoughts?

[shades]

Had same problem with my RT. It went full auto every time I pulled the trigger.
I took It to the IAO and had the techs have a go at it.
I believe they changed the pin length, the sear and adjusted the sear rod length. Works like a champ Now.

Where on the valve is it leaking? barrel, grip frame, back of reg, vent hole, the valve reg seam?