The Live Free Armory LF365 Elite Series Pistol Slide w/ RMS Cut does not include an optics cover plate.
The Live Free Armory LF365 Elite Series Pistol Slide w/ RMS Cut are not compatible wit safety models.
You will need suppressor height sights to co-witness
Yes the Sig Romeo Zero should fit this slide. It uses an RMSc footprint. If you want to co-witness you will need suppressor height iron sights.
The Live Free Armory LF365 Elite Series Pistol Slide is compatible with P365 model pistols that have a manual safety. Both manual safety and non-safety models use the exact same slides. Only the grip modules are specific to safety and non-safety versions of the P365.
Yes, the Live Free Armory LF365 Elite Series Pistol Slide w/ RMS Cut will be compatible with your Sig P365.
Yes. The Live Free Armory LF365 Elite Series Pistol Slide w/ RMS Cut will require a slide completion kit in order for it to function properly.
The RMR cut refers to the Shield RMR, Shield RMSc, Shield SMSc optics. It is a different footprint from the Trijicon RMR footprint. You would be able to use optics like the ones previously listed as well as the Sig Romeo Zero, Holosun 407K and 507K.
I would recommend the TruGlo TFX Tritium/Fiber-Optic Day/Night Sights for the P365 which can be found by using the link below:
https://www.opticsplanet.com/truglo-tfx-tritium-fiber-optic-day-night-sights-pro-set.html
Yes the new slide will fit your holster, it might be a little loose in some places depending on which holster you have and where it makes contact