An older, external hammer model. I believe my identification (if correct) is a news first. Originally, on a guess, I said it could have been a Hi-Point 9.
The videos from the police are a little less clear. I have seen two from the NY Times and the Post. I hear there is more footage available. I’ll try to get some of it up soon.
The Times released a two segment (body cam and dash) video.
NY Times / Charlotte PD.
In these videos Scott is partially visible. However it is hard or impossible to see if anything is in his hands. There are other videos which may shed some light on this.