The Ventcore IWB Mini is a great choice for the P365XL, with the gun not being a full-sized firearm it won't print through your clothing near the small of your back. The p365 frame has a longer grip but just barely. All Ventcore holsters are breathable and comfortable, by having laser-cut ventilated diamonds cut out of the inner membrane, it allows for airflow and keeps you moisture-free. The Sig Sauer comes standard with night sights for the rear sight, and the whole mounting plate can be removed to accommodate an RMR. The P365 is considered a micro-compact, but the P365 XL is just a little bit bigger which has improved accuracy for this 9mm by a lot.
If you're wanting to carry OWB, our Ventcore OWB Flex holster comes optics ready and can be used at the range, for concealed carry, as a duty holster, or whatever outdoor activity you want to carry a handgun for. Sig Sauer designed a very compact magazine that's slightly thicker than a single stack mag. The Sig P365 XL comes with 2, 12 round magazines in the box. We also offer OWB holsters in our SG-Revolution and SG-X lineup of holsters. Our belt clips for our OWB holsters are superior to any other company and can be attached to the belt without having to unloop your belt. Even though the holster is worn outside the waistband, it is still highly concealable.
Appendix carry has become a fairly popular way to concealed carry, an appendix IWB holster needs to have full trigger coverage to ensure safety when carrying in this position. Our Ventcore AIWB holster is perfect for everyday carry, and we find that lots of law enforcement officers carry this striker-fired pistol as a backup in the appendix position. All of our Ventcore holsters will be RMR ready and will fit sigs RMSc optics such as the Romeo Zero.