upgrade parts at DEN........ http://www.dentrinityshop.com/den_new.jsp
im pretty sure that u would have problems with the piston but u kno not to trust a noob like meh :-D hahaha
if its designed for it, then it should work fine. are u talking about a seperate spring? or is it the VSR-10 and the spring?
ya thats what i thought....I'll prolly buy it anywhaise
upgrade guide....very handy