Which Duty AR is King? – Nick Perna, a former soldier and currently a cop, weighs in on whether the M16A2 or M4 is a better overall weapon system. Age equals experience. One of the few perks of getting old is that you get exposed to more things throughout the course of your life. This includes weapon systems. I’ve been making a living with a firearm since the late 1980s. In jobs ranging from the military, bounty hunting and law enforcement, I've carried a wide variety of handguns, long guns, crew-served weapons and other things that go "Bang!" I've personally...