Contrary to what some people tend to believe, the purpose of the Second is not for hunting, or self defense, or target shooting. It is to ensure that the government is controlled by the people and not the other way around.
Still, I hear people saying that this doesn't apply to what people are calling "assault rifles" ( although I can't imagine any modern military using a sporting arm for battle). The Founders couldn't possibly be meaning to include the AR-15 because it didn't exist yet.
So does the First Amendment apply to TV and internet? Neither were around yet, but here we are watching the news, watching televangelists, and the freedom of speech, freedom of the press, freedom of religion still apply. Isn't it the same thing?