Small hideout guns tend to be small caliber and that means ineffectual stoppers. The current crop of ultra-light polymer-framed .32s and .380s with double action only trigger mechanisms are also very hard to hit anything with. There is a more effective alternative available. American Derringer has beefed up the traditional Remington Double Derringer to .45 Colt caliber and it also will chamber the 2½-inch .410 shotgun shells. The .45 Colt is a one-shot stopper with a hit to the vitals, and you have two shots. It is a close range weapon, but then most gunfights are also close range and...