[ucubed]

Never used the grenade launcher in MW3 yet, nor do I count on using it. I use heartbeat sensor for people who do not use assassin, people call me "noob" for using it, but it's their fault for not countering. Countering and balance is a huge factor in MW3 as said by the developers.

Now to combat the campers, I usually use a class with flash and impact to shoot through the walls.