You would want to use the same cleaning materials (lens pen, lens cleaning solution, microfiber cloth, etc.) as any other optic.
Yes, with the right adapter plate this is small enough to work on the P365.
Yes, a simi-ridged plastic cover comes with all Shield optics and it fits quite securely.
If this is an order you have with Optics planet please contact them.
The manufacturer specifically states in their owners manual for both the RMS and RMSc that it will come with the following accessories:
Accessories:
Minidial
CR2032 Battery
1° shim
2 x Button head M4x8mm screws
2 x Button head M4x10mm screws
2 x Hex Wrench tools
Yes, this would fit a Smith & Wesson Shield 9mm.
The Springfield Hellcat Pro has a slide cut to fit the Shield RMSc footprint. This Shield Sights Reflex Mini Red Dot Sight is the larger version with the RMS footprint and won't fit that slide. The sight located at the link below is the Shield RMSc and will fit the Hellcat Pro.
https://www.opticsplanet.com/shield-sights-compact-reflex-mini-red-dot-sight.html
Yes the Shield Sights Reflex Mini Red Dot Sight will work with the Hellcat OSP.
This Optic is made in the UK
The Z365XL Octane Slide has a slide cut to fit the Shield RMSc footprint. This Shield Sights Reflex Mini Red Dot Sight is the larger version with the RMS footprint and won't fit that slide. The sight located at the link below is the Shield RMSc and will fit that slide.
https://www.opticsplanet.com/shield-sights-compact-reflex-mini-red-dot-sight.html