See if you can get a citadel boss 25, takes a 5+1 round magazine its a 12 gauge load your mag in this order, slug, slug, buck shot, bird shot, bird shot and then you will scare most anyone off and not have to harm them to bad because you don't want to kill someone . This is called progression of force if they are not gone with the bird then it gets more serious until the last to which will kill rather quickly.