In a situation where it's citizens versus the government, and we're assuming the military has sided with tyrant mcpresident
the US military has full armor, video cameras, drones, mines, grenades, SAWs, tanks, apcs, control over the supply of materiel, and can cripple any city by simply blowing up bridges and putting craters in airport runways. They wouldn't even need to shoot anybody, they could just take the infrastructure and bleed a resistance out in a matter of a week.
Guns are pretty worthless without ammo. Sure, you can forge your own, but the military would control the sources for it, and you wouldn't have enough to melt down nor the ability to melt it down.
You are honestly better off heading to Mexico or Canada or surrendering as a POW and waiting for NATO to liberate you.