At Sigma Imports in Little Rock, Chris Gaudet was negotiating the new guy’s salary one day last month, ignoring the security video he usually watches from his desk. His office door slowly swung open, nudged by a salesman trying to warn his boss that two gunmen were trying to rob the place. Gaudet saw someone with a red cloth over his face and a gun in his grip yelling for everyone to hit the lobby floor. Gaudet grabbed his Colt.357-caliber pistol from the desk drawer. "It was so quick," he said. "It was all reaction." This is what you carry...