L2D Combat does not provide specific information regarding the fiber optic in their Co-Witness/Suppressor Fiber Optic Sight Set. I'd recommend reaching out to them directly for more information.
The front sight will be compatible with the X5 Legion, but the rear sight will not be. The rear sight on the X5 Legion is proprietary and does not work with standard P320 rear sights.
Yes, the L2D Combat Co-Witness/Suppressor Fiber Optic Sight Set will be compatible with a P320 Compact and Carry.
If you have a P365 that is not optics ready, then the L2D Combat Co-Witness/Suppressor Fiber Optic Sight Set will be compatible. If your P365 is optic ready, then this sight set would not be compatible.
The sights are designed to fit optics ready P series models if the sight dovetail is located on the slide, not the removable red dot cover plate.
The L2D Combat Co-Witness/Suppressor Fiber Optic Sight Set is not compatible with a Sig P365XL due the proprietary rear sight/optic plate.
Yes, the L2D Combat Co-Witness/Suppressor Fiber Optic Sight Set is compatible with your P320 AXG Classic pistol.
The L2D Combat Co-Witness/Suppressor Fiber Optic Sight Set is not compatible with the P320 X-carry Legion. Your P320 uses LPA sights like the SIG SAUER P320 X5 Legion Rear Adjustable Sight, found by using the link below:
https://www.opticsplanet.com/sig-sauer-p320-x5-legion-rear-adjustable-sight.html
The L2D Combat Co-Witness/Suppressor Fiber Optic Sight Set will provide a lower 1/3 Co-Witness when used with a Deltapoint Pro.