How do you destroy the helicopters in survival mode in MW3?

well, i suggest you do the level dome in survival because the airstrike computer is indoors so u can buy stuff without being shot by the helicopter, anyway you go to the computer with the space shuttle sign and you buy a predator missile and launch it at the chopper, you do this 3 times as of there are 3 choppers

By Jhtigsi:

By experience I would say you can just use the MP5 in resistance because there is more cover and the MP5 shoots fast. In resistance there are two choppers it might take almost all your bullets to kill both but its a better way to save money to buy other stuff. Just saying