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I just received this today (August 7th 2025) in the mail and I can definitely say, NO IT DOES NOT FIT! I have the Holosun EPS Carry on my 43X MOS with an OEM MOS Slide.
It hangs up on the optic leaving the weapon sticking out 3/4 - 1/4 of an inch.
If that metal reinforced mouth strap was either down a little more or didn’t have as much material as it does then everything would be hunky dory.
I wish I could submit a photo.
You can’t safely carry with an optic at all. The trigger is exposed to the point of unsafe and trying to push the gun in more results in out of battery.
No optic = perfect fit.
Optic = different holster
You would think this day and age all holsters (Leather - Kydex) would safely accommodate any pistol with an optic.
Also it doesn’t matter what optic you have installed (Holosun EPS Carry, SIG RomeoZero, Trijicon, etc) because the MOS side cut makes the optic to far forward on the side. If it were back some then it possibly would work but NOPE!
Sorry for such a looong drawn out answer. I just wanted to cover everything I would ask in initial + follow up questions.
Galco recommends using the Galco Royal Guard 2.0 model RG838RB for the Sig P365. This Glock 43 model may be a little loose for the Sig P365. The model at the link below will work for the Sig P365.
https://www.opticsplanet.com/galco-rg838rb-royal-guard-glk-42-p365-blk.html
Possible but not guaranteed. Please reach out to Galco for confirmation. https://www.galcogunleather.com/contact-galco.html