Could some one fill me in on rifle upgrades?

Right now I have an AGM VSR 10, but I eventually want to get something better. Though it seems that getting a good sniper often comes through upgrades; something I don't know all that much about. Even if there are snipers that are pretty good right out of the box, I'd still like to have some options when getting a new one. So if anyone could give advice on upgrading springs, barrels, etc., that would be greatly appreciated.

Here ya go:

Jim's guide to VSR-10 Upgrade and Modification

Spring upgrade guide

Ah I'm sorry, I wasn't clear enough when explaining. My plan is eventually to get a new sniper, and I was wondering about upgrades in general. Or can those links with upgrades for a VSR 10 be applied to any sniper?

Thanks!!!

I general all upgrades are simular, basicly aat the low end your looking at adding a tight bore barrel and a new spring, if you feel like spending more and getting a better rifle you upgrade your piston and cylander...add a zero trigger...basicly

-Spring
-Cylinder
-Piston ad piston head
-spring guide
-bolt handle
-zero trigger or simular.

...then if you wanna get fancy theres all sort of other ricks you can do...but thier not so easy.