Hi Dawn and welcome to the Buds community. Yes, the Optics footprint of the Romeo RS Compact is RMSc which is a direct fit without the need for an extra optics plate on the Sig Sauer P365 .380 as shown here; -- sigsauer.com/p365-rose-380-romeo-rs.html ------------ Cheers, stay safe and enjoy!

Yes, the Romeo RS Compact uses the RMSc footprint, which is the optic cut on all P365 models.

Yes, it does and without any issue at all.

Good evening to you!! The SIG Sauer P365 takes the RMSc footprint. The Romeo RS Compact has the RMSc footprint. This makes it a direct mount optic for you firearm. No mounting plates needed. Hope this helps. Have a good rest of your day.
🇺🇸🇺🇸 'Merica' 🇺🇸🇺🇸

Absolutely 💯‼️

Yes.