The M Sixth Avenue Local is a rapid transit service in the B Division of the New York City Subway. Its route emblem, or "bullet", is colored since it uses the IND Sixth Avenue Line in Manhattan. On weekdays, the M operates between 71st Avenue in Forest Hills, Queens, and Metropolitan Avenue in Middle Village, Queens, via the IND Queens Boulevard Line and Sixth Avenue, the Williamsburg Bridge, and the BMT Jamaica and Myrtle Avenue lines. This makes the M the only service that travels through the same borough via two different, unconnected lines.