I don't have the charging instrument in front of me, nor access to it so I cannot state for certain what the exact violations of the MI Code is being charged, but entering in the text of the charges leads me to the following .....
James Baker and Brandon Vreeland are both charged with violations of:
§750.227 Concealed weapons; carrying; penalty.
§ 750.170 Disturbance of lawful meetings.
§ 750.81d Assaulting, battering, resisting, obstructing, opposing person performing duty; felony; penalty; other violations; consecutive terms; definitions.
Baker is additionally charged with:
§ 750.234e Brandishing firearm in public; applicability; violation as misdemeanor; penalty.