Mont. Code Ann. § 45-3-110
45-3-110 No duty to summon help or flee
45-3-110 . No duty to summon help or flee. Except as provided in 45-3-105 , a person who is lawfully in a place or location and who is threatened with bodily injury or loss of life has no duty to retreat from a threat or summon law enforcement assistance prior to using force. The provisions of this section apply to a person offering evidence of justifiable use of force under 45-3-102 , 45-3-103 , or 45-3-104 .