6.03 to 6.05 will work well. There are 2 different diameters of springs, so you'll have to find out what you have now. Google PDI springs and you should be able to find the fps chart. And buy a firefly hop rubber if you haven't already, best upgrade you can make to any gun.
Tamiya connectors suck.
Originally Posted by swatt13
i never understood why the oil refinery had a brothel... i never see them at the refineries i work at this is bull!