I had a P938 SAS. Beautifully made little gun; it's what got me looking at other Sigs. Unfortunately, I couldn't get a firing grip without my thumb knuckle being in line with the lower left corner of the slide, with a troubling amount of overlap. Weirdly, the LCP didn't have that issue, but did have a whole bunch of other issues. The G43/48 grip setup doesn't seem to have the slide bite issue, either. For any mission where a P938 would work, I'd certainly check a G43/Gadget/grip mods as an alternative.