The Giga Missile is a fairly low risk/high reward weapon, due to its long range and above average splash damage radius. It is entirely possible to kill two enemy ACs at once. A good tip is to have a support focused teammate carry a target gun for you, and attack high value targets at extreme range with impunity. However, it should be noted that this weapon completely immobilizes the user while being charged, further solidifying its status as a ultra heavy support weapon.