Standing in the shadow of a gigantic net from the Topgolf facility next door, the nondescript XCAL building in Ashburn, Virginia, resembles any of the number of corporate offices in the area. Inside, however, there are several shooting ranges, including a tactical range, a fitness center, a martial arts dojo, and a restaurant serving bar-and-grill fare such as burgers, wings, and tacos. I was there a few weeks ago for Range Day. The annual event is the brainchild of Shermichael Singleton and John Keys, the co-founders and owners of Guns Out TV, a brand described as a “media company that...