i can almost guarantee it's a short barrel glock. the recoil springs are way too strong for subsonic ammunition, and combined with limp wristing, a huge heavy silencer on the tilting barrel, and subsonic ammunition would not cycle reliably at all. the grip looks to be full length, with a shorter barrel. the slide is barely above his palm, which excludes a p365, or m&p. it also looks rather thin like a single stack or 1.5. 43x with a homemade can is my guess.
United States