HPA and Piston question

[Raven001]

I have an older 94/95 mag. I use it with HPA and am wondering if there is anything wrong with using the stock piston. I seem to remember a conversation with the guy from Detroit Fusion who claimed there was a high pressure piston for use with HPA.

Anything to this?

Thanx

[athomas]

My 93 mag worked fine with HPA using all stock parts. If you use a level 10 bolt, the higher operating pressure may exceed the overpressure release point of the standard regulator piston assembly. If that is the case with your valve, then you will need the new higher pressure piston.