"Firearms are just one tool out of many that would be in play if an actual armed revolution broke out."

I reject your premise. How will militias assemble before these conflicts can take place? Facebook? I'm not being facetious. A ruthless government could, in a state of emergency, cut off the internet in a locality, or lean of Facebook to turn over names, or etc. The internet IS the battleground. Physical control of land with guns is a small, receding target. Guns aren't protecting us from the government, the EFF is.