You withdraw a gun in a public place?
You had better have a damned good reason for doing so, because if you don’t, I am going to assume you are a terrorist or an idiot (assuming there is a difference!) and I am going to withdraw MY weapon (legally permitted) and end your life.
Then your idiot attempts to “make a statement” about slow moving DMV clerks will have a tragic end, won’t they?
Guns are not toys, people. I believe strongly in the right of every American to have and carry one. They are also deadly instruments and the ONLY reason you ever pull one is to end another life.
Learn that lesson, or let Darwin teach it to you. Makes no difference to me.
DOR/DMV offices in M are contract facilities, not government offices, so even if posted those with CCW licenses can carry concealed.... I do. RSMO 571.107
Best thing is to do it all online, once you establish residency, pay PP taxes etc, they send you a card in the mail and you logon and pay online, the send you the stuff poste haste.