I think she uses two Glock 33's, I have an airsoft version, not a very comfortable weapon to use.
According to IMFDB, Johansson uses dual Glock 26s.
Personally, I can't stand Glocks; they're so light I can't aim my shots worth a damn. A few months ago, I was doing a Civil War living history demo at a local gun range, and afterwards a few of us tried out the gun demos for the public. The pistol range had two guns at the time, a Glock and a 1911.
The particular Glock I was shooting was equipped with a laser sight and mag-lens kit. My spread was insanely
large, at least for someone who on his worst day has a spread of less than 2 inches on the bullseye. I would have been more accurate it I threw the gun.
The 1911 was a Mil-spec .45, and one of my friends warned me about the weight. To be honest, even before firing a shot I was far more comfortable, as I'm used to heavier rifles and revolvers.
Nailed every fucking shot.