BAT 91 upper body and cannon.
Episode 1 Battle droid upper legs

Found Half of a bat at Goodwill last year, complete with his weapon attachments. Inspired by the Legless BAT featured for several pannel in Issue 131, I took some fragments of an Episode 1 battle droid, dremmeled off his lower legs, and sanded its torso down so it would fit snugly in the O-ring hole (that last bit sounded dirty). I'm afraid I couldn't bring myself to drill him some gunshot wounds.

I know his hips aren't exactly to scale, but they hadn't come out with the slimer Episode 2 Battle droids when I built him.