Was the Joker using a machine pistol in the bank and later during the convoy chase? If so, what is the make and model?
Yes. The Joker is using a customized selective-fire Glock 18 which is a 9mm handgun with an extended (31 rounds with standard floorplate, 33 with extended, the normal for this magazine is extended) magazine, since the weapon fires full-auto. He uses this handgun in several scenes; it appears to be his gun of choice. The Joker wields this handgun in the bank heist, on the semi trailer in the convoy chase, at the money burning pile, and in the hospital (it is attached with a silencer in this scene). The gun the Joker uses in the convoy chase scene, when he gets out of the truck yelling “Hit me!”, is a Smith & Wesson M76 Submachine gun with a swivel stock that is folded to one side.
