Let’s take a quick trip back in time, around 15 years or so, when Travis Haley and Chris Costa had just released a very popular DVD (remember those?) called “The Art of the Tactical Carbine,” and pretty much everyone in the firearms training industry picked up a copy and watched it from beginning to end. The techniques demonstrated by Haley and Costa on that DVD, as well as similar techniques that were coming out of a decade of U.S. involvement in the Global War On Terror, were all the rage in the gun world. The combination of these two forces…