You need a party of six for it to be very effective in objective games like headquaters, search and destroy. Basically all you do is make this class with the mac 11 and tell all people in your party also to make a class that includes mac 11. When you get into a match tell all your party to throw decoys all around the map and also place your jammers on the other side of map so the enemy team can't see anything. The good thing about this trick is the Mac 11 and the decoys sound the same so it will confuse the enemy team and frustrate them then eventually they rage quit because of all the red dots and jammers lol.
I like to just get my friends together with Ghost Pro and we do like a human centipede type thing while hiding in like tall grass or dark corners. They rarely find us.