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Yes, the Zaffiri Precision RTS Glock 43/43X ZPS.2 Pistol Slide will be compatible with a Glock 43X MOS frame.
These Zaffiri Precision RTS Glock 43/43X ZPS.2 Pistol Slide RMSc Cut are compatible with the Glock 43/43X.
This Zaffiri Precision RTS Glock 43/43X ZPS.2 Pistol Slide uses the RMSc cut, but since it doesn't use any recoil lugs it also makes it directly compatible with the Holosun "K" footprint found on the 407K/507K as well as the EPS Carry.
The manufacturer does not state what screw set should be used with the Zaffiri Precision RTS Glock 43/43X ZPS.2 Pistol Slide RMSc Cut for the Swampfox Sentinel. I recommend contacting Zaffiri Precision to see which of the 3 screw sets that come with that red dot should be used.
I would recommend using the Tyrant Designs Suppressor Height for Glock 42/43/43X/48 Compatible Sights, found by using the link below:
https://www.opticsplanet.com/tyrant-designs-suppressor-height-for-glock-42-43-43x-48-compatible-sights.html
The Zaffiri Precision RTS Glock 43/43X ZPS.2 Pistol Slide features no rear lugs and shortened front lugs making it a direct fit for the Holosun 407K/507K footprint.
The Zaffiri Precision RTS Glock 43/43X ZPS.2 Pistol Slide RMSc Cut will not work with the Holosun SCS red dot. The SCS red dot will only fit the Glock MOS slide of standard size Glock MOS models.
The Zaffiri Precision RTS Glock 43/43X ZPS.2 Pistol Slide will function as intended by re-using your OEM slide parts without the need for any additional parts.
The Zaffiri Precision RTS Glock 43/43X ZPS.2 Pistol Slide RMSc Cut will not fit a Glock 48.
The Zaffiri Precision RTS Glock 43/43X ZPS.2 Pistol Slide RMSc Cut black nitride model is the same as the Armor Black model on the manufacturers website.