What is the best Optical sights you guys have found for a 365 XL (concealed carry).

On my P365X, I'm very pleased with a Holosun EPS Carry.

Its good for personal security?

I have two Trijicon RMR’s on Glocks and two Holosun 407k’s on Sig P365’s
Best? That’s up to you.

I like the Holosuns and they have been trouble free for over 2 years. Of course the Trigicons are no slouch either.

Like any other electronic device, you get what you pay for. Closed emitter designs ( like the one above) are the new and probably better option, but I’m not changing mine, at least not for a while.

I have Holosun 407k with green dot on an Sig 365X and Springfield Hellcat Pro.

EPS Carrys here though I have some 507ks that are slowly rotating out. best option of its size I've seen.

I’m quite fond of my 507K with Green Circle / dot on my XL. I would likely move up to the EPS for my next purchase. Enclosed makes sense to me but in the last couple of years , morning wipe down has done just fine.