Hmmm. When I try the 10.1mm long M4 screws on my 43X MOS, I get severe extractor plunger interference. And the 7.5mm ones only engage a thread or so. @SwampfoxMike, do you have other screws available for the 43X MOS or do I need to chop one?
Awful pic:
Edit - aha, it looks like Swampfox may have changed to a slightly longer short screw - there’s a knowledgebase post mentioning a 8.6mm screw on the right side. I’ll contact them directly.