+1 on that, some stock rifles can be pretty damn accurate and have good range!
My stock VSR-10 still outranged stock AEG's and was really accurate

First upgrade I got was the firefly hop rubber, laylax tightbore, then PDI cylinder set. As soon as I got those it was a laser rifle lol
I tried the rifle at 440 for a game, found out it was more innacurate, went back to 400 for the rest of the season. Decided to try 440 again, broke the sears chronoing at home LOL
Bought a V-trigger and it's still a laser rifle
Just remember to clean your barrel after every game! Barrel cleaning is mandatory for snipers!!!