I'm assuming a heavy duty gun refers to an AR-15 because it's so so so scary looking. They actually work the same as a handgun or a shotgun or my kids .22. One trigger pull...(more)6-14-2016 3:15pm
produces one bullet. They aren't able to spray bullets at the rate of 100/minute. The military uses ARs and similar guns, but those or either semiautomatic or they can flip a switch and make them fully automatic. Fully automatic anything is currently banned/outlawed/whatever you want to call it.