Having seen that man and his aresenal, you're sweating bullets (except not literally, because if you were, you would at least have some ammunition, and that might make you less nervous). You need a way to protect yourself. In your haste to stay alive, you push your late boss from his seat and get behind the wheel of the car. With a little effort, it starts. The back end is smashed, but it should get you somewhere.
You know where to find a small pawn shaop off the high way only a couple miles ahead. That should be perfect. The car makes the drive with no further trouble and you go inside to see a much more expansive array of weaponry than you had expected. There are a thousand options, but there's a particular couple weapons that look like they would be good for you.