OK, so the only difference is that the “S” has the low battery compartment. To me, that makes sense has the high compartment looks like it would be more easily snagged on things.
This may be a dumb question, but is there an advantage to the high compartment that I am missing?
Or is there an obvious disadvantage to the low compartment that my in-experience doesn’t see?
Thanks for the comments!!
The bottom mount might interfere with using a magnifier or NV scope.
I don’t plan on using either, so I ordered a M4S.