heh... yeah that old .30 cal would do wonders to a dozen burglars.
actually, if you want scare factor, get yourself a spas with collapsible stock (bonus points for the arm rest thinige). but, don't expect it to be reliable. old italian design they use in stuff like terminator 2, jurassic park and stuff. poor attempt at pump/semi shotgun. but the binelli m1 convertible with pistol grip and mil-spec ring sights.. perfection
load round 1 non-lethal, the other 6 lethal rounds. if the first round doesn't drop em, switch over to semi and let em have 6 buckshot rounds in less than 3 seconds. you need pump for non-lethal tho, shells won't eject from an auto.