Mont. Code Ann. § 46-6-201

If it appears from the contents of the complaint and the examination of the complainant and from the examination of other witnesses or affidavits, if any, that there is probable cause to believe that the person against whom the complaint was made has committed an offense, a warrant shall be issued by the court for the arrest of the person complained against. The court, in its discretion, may issue a summons instead of a warrant. Upon the request of the prosecutor, the court shall issue a summons instead of a warrant. More than one warrant or summons may issue on the same complaint.