This year’s Texas Firearms Festival features Full-Auto Friday. VIP ticket holders get serious trigger time behind dozens of machine and sub-machine guns from major manufacturers. If you’ve never shot a machine or sub-gun gun, there’s a reason why they call the full-auto lever the “giggle switch.” They really are a hoot. If you have shot full-auto, which guns have you fired? Which one(s) was your favorite and why? And if you could own two — count ’em two — machine or sub-machine guns, which ones would you buy?