Any holster specifically designed/molded for the P320 FS will not fit, as the X5 is slightly longer...
I have a Blade Tech for a FS P320 and it does not fit.
If it has an open bottom then yes..The Sig holster provided with my P320 does work, and will do until my Red Hill Tactical holster arrives.
I cannot speak of the other X series p320s as they haven't been released yet.
Blade tech has their OWB signature holster for the X5. Choice of either ASR loops or tek-lol. Not listed on their website yet but can be ordered by phone. I put my order in yesterday and was quarter 2-3 days to ship
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