that amendment was ractified because the founding fathers and colonial revolutionaries fought the british with their own weapons and earned the right to independence and self-governance. that part of history has been etched deep in the american psyche. back then, weapons were mainly archaic rifles that have an extremely slow rate of fire. today, advancement in technology can allow firearms to spew out 69 rounds in 6.9 seconds. moreover, there’s also the argument that to fight a tyrannical gov, the militia or civilian insurgents’ cache of small arms no matter how advanced they are will not be able to resist a gov armed with a powerful navy, air force, and army equipped with weapon systems civilians cannot afford to match. the state level national guard in a way is the official militia created out of this amendment, and the national guard has some weapon systems equivalent to that of the air force and army, such as planes and tanks.