I few days ago I saw an idea for a new type of grenade. Please the person who thought of this please step forward. Anyways I want to restate this idea because I really like it.
Bubble shield grenades. The person was complaining about the tripod in the bubble shield so a person suggested a bubble grenade as seen in the halo 3 trailer when the chief throws a bubbly shield into the ground. The grenade would stick to the piece of environment it touches and then expand. So if you see your teamate under fire but far away you could like throw a bubble grenade and save his ass.
Credit does not go to me.