If that is what you want... first off, get a 20 gauge. You are not defending charging grizzly bears in your house. You can get a Mossberg, or several others for way under $500 at Academy sport stores. Enough money left over to get a S&W .40 cal., or Taurus PT-111 in 9 mm (almost).
Hunters & Anglers: The first environmentalists are still the best!