[soundcloud url="https://api.soundcloud.com/tracks/279286291" params="color=ff5500&auto_play=false&hide_related=false&show_comments=true&show_user=true&show_reposts=false" width="100%" height="166" iframe="true" /] Making his debut on UpcomingHipHop.net, Connecticut rapper M.A.R shares a hood-anthem track titled "Martin Luther Blvd". The song ...