By best, I mean what will give it decent range without needing additional mods or break the gun?
UPDATE: I Meant Spring.
DO NOT Post a 'which is best' thread, a 'what mods should I do to my [blaster]' thread, etc. Read the forums, make your own decision. (New Members Guide)
This is basically a repeat of this thread. There are plenty of writeups stickied for longshots that do mention the spring used.
Edited by Zorn's Lemma, 16 September 2012 - 08:31 PM.