M41 Offizer - Upgrade to PDI 130
 

I have a stock CA M41, recently purchased and stock. I am thinking of putting a PDI 130 spring in it. This is a moderate spring, will I need to upgrade any other parts? At present it shoots 300 Fp/s with .20s What sort of increase shall I expect

http://www.airsoftcanada.com/SpringChart.html

It might vary, but it can give you an idea of fps jumps between springs, regardless of the gun.

i also got a M41 and thinking of doing the same thing this winter. that and other things