where to get n sets ?! (Call of Duty: Black Ops 3)

not enough for all the cannons do not open neche do not open ... Th for a shitty game !!! all body kits do not put 2 weapons without damage to body kits do not take! only a goner gun. and weapons are also opened for improvement points. how to wind them please tell me, otherwise it bombs me with this game I want to go faster and delete it.