Individual citizens trying to fight cops with firepower is never going to work. Cops have much better equipment than you're going to have, and have the backing of the entire government.
Unless you're literally planning on staging a coup, arming yourself to fight cops is not a viable strategy.
On the other hand, if we disarm everybody, then we don't need to have such over-militarized cops either, and maybe we can finally get to a place where cops no longer automatically reach for their gun (or even carry one) and therefore stop routinely murdering citizens.
