The pistol that Rex carries bears a striking resemblence to the weapon used by RoboCop in the old action movies. Its burst-fire function in particular shows that connection. There are other nods to the film, as well. The weapon's description notes that it "was built and named in honor of a fallen DPD cop who fell in the line of duty fighting the creeps of the Detroit megaslums and industrial wastelands." The weapon is called the A.J.M. 9, in reference to RoboCop's name: Alex J. Murphy.