The Call of Duty Wikia has a complete list of the Call of Duty Black Ops weapons from the related link
you cant on the wii version
No.
You need to unlock the weapons.
no
you can,t upgrade wepaons on call of duty 4 on playstatoin 3 you can only change their skins like woodland, desert, blue tiger, and red tiger, and gold, skins.
You get to 14th prestige
Scavenger Or Scavenger Pro
disco stick
HK21 upgraded with a reflex sight
You Switch weapons faster.
yess