MP40
From Memory Alpha, the free Star Trek reference
The MP40 (German for Maschinenpistole 40, literally "machine pistol 40") was a submachine gun used by the Germans during World War II. When John Gill modeled the culture of Ekos on Nazi philosophy, they also were armed with MP40s. (VOY: "The Killing Game", "The Killing Game, Part II"; TOS: "Patterns of Force"; ENT: "Storm Front", "Storm Front, Part II")
