Buy the highest capactiy hand gun you can find if it is strictly a truck gun. If you've made it to the vehicle. givem em hell. I now have a ketlec sub 2000 in my vehicle with glock 9mm 33 round magazines. before that, had a saiga 12 with a beta mag. Dont mess around is what I suggest. If someone chases you all the way to your vehicle. send them to hell in pieces. also, since you ARE in Texas, maybe a mare's leg? Henry carries new models now.
now. if, this is just a gun you can CCW and store in your vehicle during work, buy something you can CCW. The P95 is a hog. I love mine, even though its large and unwieldly but, if you're thinking about carrying this gun CCW and just leaving it in your truck when you get to work, install a decent little gun safe under the seat, wally world carries winchester's new one, and carry something you like.
