minmag help

[vinny]

Hey I have a guy on my team who has a minimag and it is leaking air out of the back. He is running HPA and is chronoed down to about 280. Somone told me it could be the Benchmark double trigger. Any Ideas?????

[Havoc_online]

try replacing the powertube o'ring(remember o'ring first, then spacer). If that doesnt work, he may need a new reg. piston.

[vinny]

i already replaced the oring and the spacer he ran Co2 through it against my advice

[boggerman]

Have you replaced the reg seat yet? Before you replace the reg piston try taking the reg apart and cleaning everything real good and lightly oiling it before you put it together again. If the reg piston is scratched up a little, you can lightly polish it with some scotch-brite, I used the extra-fine grey colored stuff with good results.