Alright, so, I've had this since I was a kid, just laying around my house. I always wanted to do something with it, turn it into a lightsaber hilt or even add a glass tube or kendo stick inside. A few years later, and these ideas are quite possible!
The parts are all interchangable. I believe it's two flashlights put together, a main section from one (complete with a very Graflex-esque red button), a connector of another, another long extention piece, and the body and grip from a second flashlight, along with a base end. The end even has a D-ring attachment built in. The first body, connector, and extention are all smooth and uniform, and very sturdy. The bottom body is ridged the entire way through, and a bit less sturdy, but it does have a button. All pieces are screw-on on either end, except for the ridged peice, which slips on and held tight with ball berrings at the top, and screw on on the bottom.
Looks like a fun project.