Double Tap .45 caliber. My son said it kicks like a mule. I shot it and though it kicked kinda like a she-goat! Loud, powerful and can fit in your sock. Good close up defensive weapon when you need it. Holds two more rounds for reloading in the handle. Reload? Are you kidding me! Unless there are four people after me one shot should do the trick.
The Ruger Vaquero in .45LC. The classic "old west" design and single action is another sentimental favorite to have on the range or in the field. Lever action rifles can also be purchased in the same caliber. It's a great trainer for single-handed shooting.