Texas' most dangerous gangs are Tango Blast and associated Tango cliques, with an estimated 19,000 members, Texas Mexican Mafia, with about 4,100 members, Latin Kings, with 1,300 members, and Mara. 3 The Black Pistons. Black Pistons MC. The Black Pistons are actually a "support gang," meaning they work to support more notorious gangs, like the Outlaws (who will be featured in a bit). According to Complex, the "Black Pistons deal drugs and rough up enemies on behalf of the Outlaws.".