Yes, the Trijicon Dual Illuminated RMR will mount directly to RMR cut pistol slides without the need for an adapter.
The Trijicon ACOG Mount RMR Dual Illuminated 1x16 mm 9 MOA Reflex Sights will fit that slide.
The P320 M17 is optic cut for optics that share the Leupold DeltaPoint Pro footprint. Since the Trijicon RMR uses a different footprint, it is not compatible with the M17 without an adapter plate. The Trijicon RMR/SRO Adapter Plate for Sig Sauer P320 (linked below) would mount to your slide and convert it to accept the Trijicon RMR. As for the RMR itself, there are many options that can be used for a variety of purposes. Smaller dots will equate to more precise shooting while larger dots allow for faster target acquisition. The RMR's listed on this page are dual illuminated models that require no batteries to function but will rely Soley on the light they collect in the fiber optics and tritium to power the dot when no light is available. LED models use a battery loaded at the bottom that allow you to adjust the brightness manually (or automatically for buttonless models) which is the preferred feature as everyone's eyes are different and you may prefer a specific brightness setting that the dual illuminated models do not offer. Email us at Techsales@opticsplanet.com for more information and assistance in selecting an optic for your needs. The adapter plate required to install an RMR to an M17 is linked below, it will include the hardware required.
https://www.opticsplanet.com/trijicon-rmr-sro-adapter-plate-for-sig-sauer-p320-le-pro.html
To fit the Trijicon RMR Dual Illuminated 9 MOA Reflex Sight to your M&P Shield, you will need to purchase and install the Evolution Gun Works Trijicon RMR Sight Mount, which can be found by using the link below:
https://www.opticsplanet.com/evolution-gun-works-trijicon-rmr-sight-mount-1-780-in-aluminum.html
To fit the Trijicon RMR Dual Illuminated 9 MOA Reflex Sight to a Glock 22, you will need to purchase and install the Evolution Gun Works Trijicon RMR Sight Mount, found by using the link below:
https://www.opticsplanet.com/evolution-gun-works-trijicon-rmr-sight-mount-1-780-in-aluminum.html?_iv_gun-model=glock-22
The Trijicon RMR Dual Illuminated 9 MOA Reflex Sight is not compatible with the P365 X-Macro. You can fit any optic with the RMSc or Holosun "K" footprint. A few compatible options are the Shield RMSc, Holosun 407K/507K, Holosun EPS Carry, Sig Romeo Zero, and Sig Romeo Zero Elite.
The Trijicon RMR Dual Illuminated 9 MOA Reflex Sights will only work with the RMR compatible MOS mounting plate.
The Trijicon RMR Red Dot Sight will mount to a Springfield XDM Elite OSP using the corresponding mounting plate from Springfield.
While you can technically use the dual illuminated with night vision, I highly recommend going with the adjustable LED models for night vision because the dual illuminated has no brightness adjustment which will affect the overall effectiveness of the RMR under the multitude of night conditions that night vision can be used in.
No, only the standard Romeo1 will fit the slide of the Sig X-Carry.