Thanks, 1pt21! After some reading it looked to me like it physically will fit, and I figured that one CR123A will be out of regulation right away. Sounds like the M31 is a better match, but right now the M31W is out of stock.
No worries, I have probably over a dozen Malkoff drop-ins floating around all the way from the old school stuff, hand engraved M60's, limited runs, flood versions, a tower for one of my SF M6's, to new and current offerings. So I know my way around them, as MANY MANY CPF'ers do as well (as you can tell from the quick replies)!
Yeah, I personally find myself using the various M30 offerings the most as I can run them well on 2x AA Eneloops :candle:
If you're dead set on the warm version it does look like you will have to wait (I think you can sign up for an email alert when they come back). Really there's no way of telling how long the wait will be, but I've never waited too long. With that said, the tint on the regular M31 is by no means horrible
Enjoy!!!