I had this idea after I obtained the gun in the game. It would have be modified so people Cannot abuse it.
The Idea's are:
Main fire would take a 2 second recharge, does 20 damage.
Secondary fire: In order for it to do maximum damage, You will have to charge it for 3 seconds. It gets weak at 4, then injures you at 5. Has a 30 second recharge. Can also be used to rocket jump.
Pressing M while equiped: Uses it as a melee weapon, 10 damage. 1 second recharge.
Thats about it, but to find more ammo for it, You have to pick up an icotope box.