The Call of Duty Wikia has a complete list of the Call of Duty Black Ops weapons from the related link
You need to unlock the weapons.
You get to 14th prestige
HK21 upgraded with a reflex sight
You Switch weapons faster.
yess
yah
ak-74u with rapid fire
Call of Duty Black-Ops Because it is awesome and you have a better choice of weapons then GTA
i believe there are 15 prestige levels in call of duty black ops.once compeleted 15th prestige you will unlock gold camo for all of your weapons.
what r the wonder weapons like ray gun n thunder gun in black ops 2 treyarch
Not officially, but equipped weapons and wonder weapons have different chances of appearing depending on the situation.
Yes a lot of the guns are real but with a different name.