While there is a lot of info on this site please do not rely on just one source for your legal information. Also, while asking questions is a very good thing, please do NOT ... NOT EVER... take anyone's word for what the law says.... ALWAYS search the actual laws on the Michigan Legislature website here:
Michigan Legislature - Home
to find the law itself.
Another website that is filled with folks who have a very good understanding of Michigan gun laws and can answer your questions is OpenCarry.org:
Link Removed
I'd like to emphasize something very important... please do NOT open carry until you understand the laws because one little screw up can put you in prison.
An example of a little screw up in Michigan....
Open carry without any permit is legal in Michigan. But to legally possess a pistol in a vehicle the pistol MUST be in a case in the trunk (if the vehicle has a trunk it must be in the trunk) or inaccessible to people in the vehicle. So folks without a permit can transport their pistol, in a case, in their vehicle, to where they want to open carry. Then they must take the pistol out of the case, load it, and holster it. And when they are done open carrying they must unholster, unload, and put the pistol back in the case.
And here is where the screw up comes because the tendency is to try to not alarm anyone by hiding the process by keeping the pistol out of sight still inside the car or still inside the trunk ... but without a carry permit it is illegal to take the pistol out of the case/put it back in the case... while the case/pistol is still inside the car.
And just by trying to not alarm folks equals a little screw up that can put a person in prison.
Oh yeah... if after following the process perfectly but then leaning back into the car to get something and the gun breaks that line from outside to inside........... yep, you guessed it.... without a permit that is illegal.
But all of that does not apply to someone who has a carry permit.