there's no place else to get it, or just for the fun of shooting stuff, the feeling that gun ownership is an absolute right, and non-negotiable, runs deep here. everybody's backyard look like this? - uh... - ours does. justin and ashley mcmillion are the nice couple next door... [rapid gunfire] if unusually heavily armed. - yeah! [laughs] - our muzzle brakes are the only kind that actually reduce recoil, muzzle rise, and flash. - they own jmac customs, a home business that designs and builds custom weapons and parts. - so this keeps you on target and makes sure that you're safe while you're shooting. - three, two, one. - now, to be clear, these are fully automatic firearms. they cannot be purchased legally by individuals anywhere, but as they're in the business, these guys could apply for special, highly vetted atf licenses for purposes of product development and testing.