What is the best gun on modern warfare 3?

My Class

Weapon: mp-40

Side Arm: colt or waither

Primary grenade: sticky

Special grenade: Tabun Gas

Perks: Bandoiller, Stopping Power, steady aim you need because mp40 moves to the side alot and it messes you up when you are shooting and Ordinance Training

This gun has the highest damage right in the game and its my favorite ww2 weapon.

Edit:

Why did this liar say ray gun?

You can only get ray gun on campaign if you do the secret and in the co-op level "Nazi Zombies" from the "? ? Mystery ? Box ? ?"

And in that type of gameplay you may not edit your classes.

hes right you cant get the ray gun im 10th prestige 65 and il tell u the best guns out of ther categories

rifles:stg-44,m1a1 carbine,m1 garand ( sniper scope) - (if you dont like bolt action sniperz)

bolt action rifles-PTRS, mosin nagent (sniper scope)

machine gunz - FG42 , type 99 or browning

sub machine gunz- type 100 , ppsh,mp40 (have these al with round drum box magasines)

shotgunz - are really pointless