installing s90 spring
 

Hey guys, its my first time installing an s90 spring. where does the spring guide go through, is it to the tighter coils or to the more loosen coils.

thanks,
carl

Tighter winds always go to the rear. If you're not using a ball bearing spring guide or piston head, put a little oring lube on the ends of the spring to help keeping it from binding up.

thanks. just finished upgrading my own mp5 after 2 1/2 hours phew!