Answer:
I am an insect half of my name is another insect. I am similar to the name of a famous band.
I am filled with garb the price is free. Just return what you don't need.
I get paid to shoot people then blow them up.
I run through hills. I veer around mountains. I leap over rivers. And crawl through the forests. Step out your door to find me.
I cut through evil like a double edged sword and chaos flees at my approach. Balance I single-handedly upraise through battles fought with heart and mind instead of with my gaze.
What did the piece of wood say when he saw the screwdriver and screws approaching?