I've seen the first 2 of those before, but that last one, I haven't seen. On a display hanger of Fretted Friends, the guitar shop in my town that closed almost ten years ago, there used to be a Martin electric (I know, right?) shaped like an M-16 that had 2 humbuckers. It looks like this one has the pickup switch in the trigger, which the Martin also had.
Damn, now I really miss that place. It's been turned into a pizza slices joint now.