What weapon is best?

Hi, im new in bf heroes and i want to know wich weapon is the best, doesnt matter if Funds or not.
Made some free funds with offers, now about 9000, would do more if i know what it is best for
Sorry for my bad english

Hi, the first, weapon for what classe of soldier, gunner, commando or soldier? Royal or National?
Give it a trick. All stolen or looted weapons are the best, so are worth more expensive.
If you be buying stolen weapons Royal Nationals and vice versa.
Example, the SVD sniper stolen is superior on damage to SVD National original.

Good luck !