your choice of sidearm... 9mm, .40 cal, .45 cal, and .50AE if your are ballsy...
but i would go with aftermarket system with window and hood detection if you have to park where you cannot see your vehicle most often!
i fortunately am almost always within visual distance of my vehicle where i work and typically park
2007 Wrangler Unlimited X
Jeep Green, Black Cragars, Black Windows