You're asking the wrong people!
I once called a local police dept. I was thinking about buying a hunting knife, and wanted to make sure I didn,t break the law.
I was told that any knife with a blade over 3" would be confiscated.
So I looked up the law, and called a couple of other State Police posts and asked them the same question. I was told the same thing, they would take away any knife with a blade of over 3".
I called another State post and was told this again, this time I read the law to them.
Michigan -750.226... Carrying with unlawful intent
Any person who, with intent to use the same unlawfully
against the person of another, goes armed with a pistol
or other firearm or dagger, dirk, razor, stiletto, or
knife having a blade over 3 inches in length, or any
other dangerous or deadly weapon or instrument, shall
be guilty of a felony, punishable by imprisonment in
the state prison for not more than 5 years or by a fine
of not more than 2,500 dollars.
They told me that they would just assume I was carrying it with unlawful intent.
This is coming from the Troopers who 2 of their fellow Troopers were found guilty of Poaching Deer From their Cruiser while on duty with a confiscated rifle.
Moral of the story, listen to Gollnick