The M1 carbine was also utilized by many law enforcement businesses and prison guards and was prominently carried by riot police in the course of the civil unrest from the late 1960s and early 1970s; right up until it was replaced in those roles by more modern day . Reference https://btindustries9mmhandgundea86306.blogdigy.com/indicators-on-ruger-31148-you-should-know-52140198