Thanks, I appreciate all the suggestions and links.
I'm not a fan of that IWC offset mount, though this is more of an aesthetic thing. Also, I already have a
IWC Radial mount, so I'd prefer to work with what I have rather than buy another mount.
The Inforce is a bit out of my budget. I'm aiming for sub-$60 for the light.
BUIS behind the light is a good idea - I'll have to try that and see how it affects hand position and thumb activation of light. It might end up pushing my hand too far back because there's very little room to hang the light forward of the handguard without exposing it to blast. Thumb activation should be ok with a paddle switch activated light like the TLR-1. Might require more distance between light and front sight for tailcap switch light. But I'll play around with it and see.
The light-modified front sights are interesting, and a friend has one, and they're available for more than just Surefire lights, but they are pricey.