It is funny how killing machine nuts seem to think that because muskets were needed to defend oneself before police existed
...along with rifles, pistols, mortars, and freaking
cannons. Yes,
cannons. You really need to go check out some history books. Muskets were exceptionally common, but they didn't specify any weapon types for a reason: technology advances.
Also, how does the police existing change anything? They can't pop in just when you want them to, like some genie. You're on your own, and it's
your job to protect yourself. Choosing not to take on the burden of keeping and using firearms is one thing, but denying others their rights to the same is wrong. In doing so, you would be commanding them to (1) obey an upper class, that can afford armed guards and enforcers, and (2) be easy prey to anyone who got themselves a already gun by not giving two shits about the law,
like most violent criminals do.
The right to life and liberty implies a right to defense, in a nation that already outgunned most of the world, on a per capita basis, and the 2nd clarifies that.
<- only owns one gun, keeps it for sentimental reasons, hasn't fired it in years.