- At least one flash-bang (probably) and one tear gas grenade (definitely) were used on the capitol steps.
- Their duty as police is to protect and serve, so shooting would have been a terrible idea. Evacuation is not difficult in an ultra-hard target like the capitol, and a lot of civilians had bags, some of which definitely contained firearms. I also heard some shouts about fetching guns from hotel rooms (we did not stay overnight in the city). A gun battle would have been catastrophic on both sides.
And repeated examples of disregard for collateral damage and proportionality during enforcement like: https://www.independent.co.uk/news/world/americas/ups-driver...
Protocol changes are made like ones with regards to high speed chases but often only after a lot of hubris in which police and/or bystanders die
https://www.fox5dc.com/news/woman-shot-killed-after-pro-trum...
[1]https://www.businessinsider.com/ashli-babbitt-tweeted-qanon-...