I dont think so. There is no space for the clip. And if you reverse it, the switch-signal from the inner tube wouldn’t have contact to the driver-board.
This pic shows some space, maybe not enough, could be machined out more from the head, maybe
The shouldered battery tube at the head end looks to be the same diameter, again, maybe?
It would be a nice feature, being able to reverse the clip, I like being able to attach it to a ball cap brim when the need for a hands free situation arises.
I think the FW3A’s clip looks pretty decent as-is.
Usually I’d suggest a deep-carry one instead, but with the way the body is shaped, I’m not sure that would really work well. Having the clip just across the narrow part of the body is a pretty good design.
TBH, I think the FW3A will probably be better than the D4… but the D4 is available right now while the FW3A seems like it won’t be around until next year.
If you want less overlap in functionality though, the D1 is already up for pre-order…