If you are referring to why only one area lights up as opposed to all of them, I presume it's intentional to mimic what such rotary weapons do (one barrel firing at a time as it spins, that is).
I think you might be going a little bit overboard there.Typical back kibble. The grey cylindrical lever operates his mouth guard up/down and triggers his 2 phrases -"Ironhide here" and "Weapons ready" ....pathetic and downright annoying.