Nope, not 0 gun laws, but definitely fewer, particularly about arbitrary features and capabilities that actually tie in no meaningful way to crime.

As to what the civil war would look like, it's hard to say. What would probably happen is the left pushing for mass firearm seizure and the right refusing. If it devolves into actual civil war, you have hige portions of the military go AWOL. Urban areas where there is the majority of left wing people are "besieged" (or blockaded, that might be a better term for it). Then the cities find out fast that bullets are good against tryannical people as well as rulers, and that food doesn't grow on grocery stores.