Unlockable 87-88

[minh2]

So I've look around the whole forum and other website but not getting any accurate information. Some people say this, others that.

How do I exactly unlock Unlockable 87 and 88?

87) ? - Obtain a set total of machine gun bonus points in free mission. (except Helicopters missions)
88) ? - Obtain an armor bonus in each of the free missions.

Any tips also? I heard for the Machine gun bonus, I have to get 200 machine gun bonus point at the end of every mission except the 3 helicopters one and the AC-130. Is this true ?

For the Armor bonus, as long as I obtain a few points at the end, I should be fine getting it ?