I thought some folks might find this interesting/amusing.
these are, as I recall, the original 3 models of Surefire handheld lights. The 6P came first, but I can't recall if the 6Z or the 3P came after that, but according to the link the 6Z came out in 1997 so that was probably first. I don't think I ever bought a 9P, but if I did I don't still have it. Looks like the 3P did a whopping 15 lumens, and at the time everyone thought that was like holding the sun in your hand. the link above says that the 6P did 65 lumens, but I'm not sure that's accurate given the 15 of the 3P.
Later on, 2001 according to the link, came the 6P Polymer lights, called "Nitrolon". Lots of folks modded them like you see in in the pics to put different heads and tails on them ("clicky" caps) as well as things like the flipup red filter you see. There were replacement/upgrade lamp assemblies for all of these that came in the little plastic tube like you see in the pic.
I also stumbled on a bunch of mounts in the same box. I don't think any of these are near as old as the 6P, 6Z, and 3P.