I think this is mostly inaccurate? The Jan 6 protestors/rioters mostly left their guns at home due to fear of D.C.‘s strict gun laws. Even the oathkeepers planned to keep their guns in Virginia and ferry them over by boat only once “called up as militia”.
The Capitol police are used to dealing with protestors and demonstrators and have never opened fire on a crowd with live ammo before. The one time it did look like a rioter (Ashlii Babbit) was going to get too close to members of Congress they used their firearm without hesitation.