The German "Night Pistol" is a prime example example of what Nazi engineers and scientists were capable of, and hints at the kind of weapons they may have developed had the war gone on. The .30-caliber Luger incorporates a tac light housed in a cylinder under the barrel. Not only that, but the recessed brass plates on the grip are part of a circuit connected to the light and its battery. When the gun is gripped, skin conductivity between the plates completes the circuit, and the light turns on. Not a far cry from modern pressure switches—all made in the 40s, with no polymer components.