Not confirmed yet:
Call of Duty: Black Ops 2 could feature a points system that enables players to choose their loadouts, rather than series of fixed weapon and equipment slots.
Black Ops 2's class creation system will give players ten points to play with, which can be spent on weapons, attachments, perks and equipment
another website stated:
If you want to equip your primary weapon with three attachments, you can do so, but you may not have any points to spend on a secondary weapon.
More Gameplay, from the maps: Turbine, Yemen, Aftermath