The M577 A.P.C. (Armored Personnel Carrier) is a fictional vehicle featured in the movie Aliens. It comes in three variants; M577A, M577A2, and the M577A3. It's a light-weight, inexpensive vehicle used by the United States Colonial Marines which can fit into a UD4L Cheyenne Dropship (turret stowed). There's a Tactical Operations Center in the rear of the cockpit, in which a commander may get audio and video data from his troops. It also holds a transmitter to send information back to its mothership.