Many of us use a match grade pistol—the IDPA gun or the IPSC gun—for home defense. The reasons are simple. The pistol is accurate, easy to use well, and one that we are likely most familiar with. The pistol may have fired many thousands of rounds without a failure. When it has needed new guns springs, or a magazine has failed, it has been at a high round count, demonstrating reliability. But then you read that the authorities on personal defense say you should never carry a modified gun for personal defense.