If you legally purchase it, properly secure it, and have the proper permit(if you intend to carry it), then you shouldn't have any problems.
If the cops pull you over, you are required to inform them that you are carrying registered firearm.
As for placing your hands where cops can see, that's routine precaution for everyone.
May I ask what you intend to with it? For protection or simply exercising your second amendment rights?
For protection in case one crazy lunatic comes at me and my my family.