The Wee Man. Whole film here - https://www.youtube.com/watch?v=ie1AU1HnLa0

Released in 2013 in tells the life story of former Glasgow gangster Paul Ferris. It mostly concerns his conflicts with two families, one of whom was headed by Arthur 'The Godfather' Thompson who he worked for then went to gang war with. Plenty of violence for those who enjoy the genre.