Fits most Shield RMSc cut pistols.
GLOCK G43X MOS and G48 MOS withRMSc Shield
Springfield Hellcat OSP
Springfield XD-S Optics Ready
Ruger Max-9 Optics Ready
Mossburg MC2 SC
SCCY CPX1 and CPX2 Optics Ready
Sig Sauer P365
Yes, people use the two names for the same cut. RMSc is the compact Reflex Mini Sight footprint from Shield, so a slide cut for it is often called a Shield RMSc cut. This PA01 adaptor is made for that cut, found on pistols like the Glock G43X MOS, Springfield Hellcat OSP and Sig Sauer P365.
No. RMS is the full-size Shield footprint and RMSc is the smaller compact version made for slim pistols, so a plate for one won't fit the other. The Infitac PA01 is for RMSc cuts. Slide cuts can also change between model years, so compare your pistol to the list on this page before you order.
Not directly. The RMR footprint is larger and uses a different screw pattern, so an RMR won't bolt onto a slide cut for RMSc. That mismatch is what adaptor plates are for. The PA01 sits on an RMSc-cut slide, such as a Ruger Max-9 Optics Ready or Mossberg MC2 SC, and takes a compatible Infitac optic.