Call of Duty: Black Ops II uses a 'pick-10' system for online multiplayer. Meaning of all the guns, attachments, perks, grenades, and wildcards that you have unlocked, you can pick a combination of only 10 to use at one time.
Although I like this idea, it keeps the playing field more level, I would like to be able pick more than 10, to get some more attachments on my secondary, or use all my wildcard slots, etc.
In offline-multiplayer, every gun and attachment is unlocked for you. Me and my buddies have played split-screen with a 'pick-17' system, where we were able to fully custom classes using every weapon in a combination of 17 items at once.
Can you increase the max items allowed in online multiplayer? Do you get an extra one each time you prestige?