To be honest, most military people don't know any better. When I was in Iraq, we had people who didn't know what the vast majority of weapons and vehicles were, or what they even did. The only time someone may have known was when they operated the system (i.e. tankers, MRAP drivers, etc) or who had been engaged by the system before (i.e. infantrymen knew their small arms, engineers knew their IEDs) but otherwise unless you had a serious geek out there (like me) they were completely ignorant - even at the senior NCO and officer levels.