Only stops leaking when the trigger is held in

[John Dresser]

I could use some help.

Just got a Mag in a trade but it leaks so bad it feels like it is assembled incorrectly. Everything looks right, but it's been a decade since I tore one of these apart so who knows if I remember.

The gushing barrel leak goes away when I hold the trigger in.

Classic mag, foamie bolt, stock on/off assembly.

[secretweaponevan]

I could use some help.

Just got a Mag in a trade but it leaks so bad it feels like it is assembled incorrectly. Everything looks right, but it's been a decade since I tore one of these apart so who knows if I remember.

The gushing barrel leak goes away when I hold the trigger in.

Classic mag, foamie bolt, stock on/off assembly.

If it leaks when trigger is pulled back, the leak is 99% of the time the on/off top teflon o-ring.
If it leaks when it is just sitting there, it is the powertube o-ring.

Add oil.
For Level 7 bolts:
Change powertube o-ring or use a longer spacer.