In its stock form its never going to shoot them as far as you want. I would start by opening up the blaster and getting the post out of the turret that could help somewhat. Really until you mod it its never going to do what you want.
There are some good easy guides to follow here. Just search At3k in the modifications directory and you will find some.
Thank you for the help! I think I'll just wait 'til I can afford to mod it then.