bad airleak on classic

[magn00b]

There is a pretty bad leak comming out of the back end of my mag, ive replaced most of the orings back there, and still no sucsess ... same thing happens on both c02 and nitrogen. Please help

[magn00b]

Just to provide some more information about the mag, it is a 68 automag classic, has an eclipse kit on it, drop forward, and an expansion chamber for c02. please post possible solutions to my problem.
Thanks

[Won Hunglo]

Change the rest of the o rings

Not just most of them.

[jewie27]

Turn down the velocity on your 'Mag and make sure you put the Reg Seat back in the valve.

[magn00b]

Thanks for the advice, ill change all the orings and mess w/ velocity, but could it have anything to do with the reg pin assembly??

thanks