Guns. Effective firepower in the hands of citizens was eliminated after prohibition. Ownership of Thompson machine guns or BARS or M-16s was banned. So resisting the Federal SWAT teams realistically isn't feasible. They can use gunships, grenades, armored vehicles and automatic weapons if necessary and occasionally do against US citizens. What they allow us to own, semi-automatic rifles and handguns, are not enough to contend with the US military or their para-military alphabet agencies.
They are enough for us to defend ourselves against a riotous and unruly mob however. Especially in the country. Most country men and women are pretty good with a scoped 30 caliber rifle or AR-15 with iron sights. Many are veterans. We know the democrats aren't hoarding ammo and passing gun restriction legislation out of concern for victims of deranged psychos, though, so why their obsession with disarming us completely?
You must understand Marxism to know. Marxism is the instigation of class warfare with the underlying motive of initiating a change in power that is then usurped by the Marxist. So here's an example. Create a bloody race war and then step in and restore order as the new and improved federal police system. Oversimplified, obviously, but it explains a lot. Handcuff civilian police, disarm whites and throw them to the mercy of criminals who are predominantly black and brown and then step in as savior.