https://www.youtube.com/watch?v=AlxsZ-kQ5Ks
This is the video that causes confusion. That yahoo article is also a bit suspect. Most of the firearms seized have some sort of qualification to it.
"Handgun (Alberts was arrested after the riot was over, at 7:25 p.m., on a street near the Capitol and was accused of having a firearm.)"
"Multiple firearms (Coffman is not charged with being on Capitol grounds; allegedly had two guns on his person, plus firearms in his truck parked on 1st Street SE in Washington D.C.)"
"Firearms (Meredith arrived in Washington after the riot was over but was charged with having three guns in his possession.)"
Two just say firearm and handgun.
My personal favorite "Skateboard"
If you want to hang your hat on this article, go right ahead but anyone with a grain of credibility can see that this is hardly a slam dunk on the claim that this was some uber violent armed insurrection.