I have been wanting to get a Franklin Armory binary trigger for a while now. They look like a fun range toy assuming you have a big berm/backstop, however, I have not been able to get a solid answer on their legal status in MI. I know the fire on pull fire on release has been approved by ATF going back as far as the 80s based on one shot per "function" of the trigger which is also word for word in MCL 750.224.