Help for newbie needed

[Daymond]

Hi guys, don't know if it is right topic to ask and maybe I ask stupid question. My girlfriend is almost professional shooter bur she doesn't like airsoft so she owns few guns for her favorite target shooting. And she's got optics for it, for example https://tacticsfaq.com/holosun-510c-gr-elite-review/ sight for her Glock pistol. Now she is going to chage it to Sig Sauer and I wonder if it is possible to use her old red dot for my Umarex Glock 17? Sorry, I am noob?

Edited April 25, 2022 by Daymond
Adding review for red dot in order to let understand what I mean