So where I go to school I can carry my pistol in my vehicle and leave it in the parking lot but can NOT take it out of my vehicle. So I want a knife...but it still has to fall with in the letter of the law 4. I recently purchased a double-edged survival knife. Does Michigan law allow me to carry this in my vehicle? MCL 750.227 No. A dagger, dirk, stiletto, or double-edged non-folding stabbing instrument of any length, or any other dangerous weapon, except a hunting knife adapted and carried as such, cannot be carried concealed on or about a person, or whether concealed or otherwise in any vehicle operated or occupied by the person, except in their own home, place of business or on other land possessed by the person. 5. Is it illegal to have a knife with a blade over 3 inches in my possession? MCL 750.226 No. Michigan law specifies that a person, with intent to use the knife unlawfully against another, shall not go armed with a knife having a blade over 3 inches in length. so i need a 3in blade I suppose, folding not fixed since I obviously won't be hunting, I will be in class. I go to class late at night, and in the *city* and am quite done feeling like I have nothing for safety besides running to my minivan LOL sooo what do I get?