There were lots of Jan 6 weapons related convictions:
"180 defendants were charged with entering a restricted area with a dangerous or deadly weapon, which includes firearms and other types of weapons." [0]
What you described as a riot is considered by others to be part of a "fake electors" plot, to keep Trump in power after he lost the election [1], a plot which Pence didn't go along with. Trump even tweeted that day about it:
"If Vice President @Mike_Pence comes through for us, we will win the Presidency." [2]