Before messing with the spring and risking breaking that already fragile gearbox, I'd see what a tightbore and a better piston head give me. Having a better seal is more productive fps wise IMO. It's not waisted upgrade anyway if it don't go as high as you want.
I also heard good thing about twist barrel. They are made for sub 350fps guns and some people reported very good range and crazy acuracy.
I'm considering one for my TM P90tr wich run at 350fps.
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Vérificateur d'âge: Terrebonne
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