NOT a glock. Glocks have a larger slide.

This is a Sig-Sauer, either a p220, p225 or p226 (hard to tell from this angle). the groove on the front half of the slide is the giveaway.

Not a p228 though, trigger guard isn’t curved at the front.

the funny thing is, someone said the same thing last time.
Why does everyone assume every handgun they see is a glock?
AAK15 was close with the guess of a Beretta, they have the same kind of cutaway on the slide, but less pronounced than the Sig.