When it comes to picking the one best all-around gun, Caleb reckons that for his money, it’s the GLOCK 21 Gen 4. Take a Xanax, GLOCK haters, because he backs up his choice with plenty of well-reasonsed support. The big .45 isn’t, he cautions, necessarily the best gun at any one thing. Not the best for competition, self defense or as a hunting handgun. There are arguably better choices for each of those purposes. But as he sees it, the G21 is the best single firearm for getting all those jobs done. Fortunately, most of us aren’t confined to only one gun. Unless we are. In which case, if you had to choose only one pistol for all your ballistic needs, what gun would it be?