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I got the golden Knife and I'm close with the crossbow. Am I going to lose them? --- "OH HELL NAW" Thunder_Mystery about me in this topic http://www.gamefaqs.com/boards/960189-call-of-duty-black-ops/58080808?page=2
You keep all your cameo and all the attachments you unlocked for guns. BUT obviously many of the guns will be locked again, so once you get to the appropiate level and rebuy the gun, youll have everything back that you previously unlocked.
You get one permanment unlock token which you use at level 4 when create a class opens up and unlock one gun/killstreak/perk, whatever, permantly. Again, if you prestiege again in the future, youll have to wail to level 4 to use your perma unlock items again once create a class opens.