Since no one ever though of the bouncing betty yet, I guess I might as well put it out there. Since you can choose which primary gun you'd like to use, I thought they should have an option like that for grenades. You could choose between the grenade or the bouncing betty.

The bouncing betty would be like a landmine. You could put one down on key areas. Like a bridge, near intel, etc. The bouncing betty would have the same damage as a grenade and the same area-of-effect. To trigger a bouncing betty, you have to step an adjacent 5 blocks to the planted bouncing better. 75% of the time it will be lethal, and the 25% they might survive. You get only 2 bouncing betties. They can not be placed 10 blocks adjacent to the intel, they cant be placed 10 blocks adjacent to each other, and they have a tiny antenne sticking out from the ground from which they are placed. This is so you can avoid a bouncing betty, and would make you caution when your walking around the battlefield. Leave a comment and tell me what you think of the bouncing betty ^_^