>> anthony: they own jmac customs, a home business that designs and builds custom weapons and parts. >> justin: so this keeps you on target, makes sure that you're safe while you're shooting. put the mag in. >> tony: safety off. >> justin: safety off. you got it. >> tony: all right. >> justin: 3, 2, 1. >> anthony: now, to be clear, these are fully automatic firearms. they can not be purchased legally by individuals anywhere, burr as they're in the business, these guys can apply for special, highly vetted atf licenses for purposes of prordut development and testing. >> tony: that was just really- that was a lot of fun. i'm a child, what can i say? >> ashley: who wants to blow up pumpkins? >> justin: just mixed up a binary explosive. some are small, and some are big. you'll only know when you shoot it, so. >> tony: ew, a surprise, i love surprises. >> justin: 3, 2, 1.