Greetings incan fans,
Just a quick foray into the argument for using the MN-20 on primary CR123s..I can barely think of any reason to use it.
Burning through 6 primary cells in one hour is hard to justify, accept for the fact that the beam is pure devestation in any situation. The argument for The MN-15 is that its more efficent, throws further, and is whiter than the MN-20. The argument for the MN-21 is that its brighter and whiter than the MN-20, and its basically just more amazing, despite the short runtime.
I would use the MN-15 but I have traditionally had bad luck with all MN series lamp assemblies exploding or burning out in the surefire turbohead. I hesitate to keep playing the warrany card on a setup that the surefire warranty won't cover. (MN-15 is only meant for the M3). The MN-21 is a lot of fun but too cost prohibitive. I guess the MN-20 is a compromise?
Are any incan fans actually still satisfied with running the M6 on the MN-20 with primaries? I'm interested in hearing from people who run it on primaries and not rechargables.