Imagine sitting down to dinner at a restaurant with your family when in walks a handful of men armed with assault rifles. Are you frightened, maybe angry? Or do they make you feel safe? That’s the question at the center of a bitter and increasingly public battle surrounding a group of gun-carrying activists in Texas, who brazenly flex their legal right to bear arms by carrying around assault rifles in public. The group calls themselves “Open Carry Texas.” Their enthusiasm for packing heat in public has led national chains like Chipotle, Chili’s and Jack in the Box to ask customers...