Problem with that scene is he passed up on the FAL sitting on the table right next to him, would have worked much better against the armored bad guys, if less dramatically pleasing.
He uses a HK p30 and Glock 26 in the first film (plus some battlefield pickups), a Glock 34 mostly and a Glock 26 in the second (again including some battlefield pickups, and the Kimber Warrior) and I can't recall in the third, other than that 2011, STI in 9mm major IIRC. I think it's mostly various Glocks he picks up from bad guys, I know what looks like a 19X sneaks in that one scene on Casablanca