There is a thread somwhere that had a lot of information. I'll see if I can find it.
I got tired of looking /ubbthreads/images/graemlins/icon3.gif I'll list some that I think of and let others add more.
The Surefire E series heads fit McLux PowerPacks.
KL1 fits & works with McLux 1x123/2x123/3x123
KL4 fits McLux 1x123/2x123, but works best with 2x123
"E" bezel with MN01 for 1x123 McLux
"E" bezel with MN02/MN03 for 2x123 McLux
KL1 & I think KL4 fit & work on Streamlight Scorpion
KL1, KL4, PR/PR-T heads fit Surefire E series, McLux, UBH, VitalGear bodies.
The E2C is a step-up addaptor that enables E series, McLux bodies etc. to use Surefire Classic bezels, KL3, KL5
OK CPF do your stuff and add as much as possible /ubbthreads/images/graemlins/grin.gif