It's not a blanket ruling. The opinion is carefully crafted to state bluntly that the right to keep and bear arms is NOT unlimited.
Our right to own firearms is now limited to the type of kit that was available at the time the Second Amendment was written...handguns and rifles, and the gun grabbers will enact laws that will surely try to limit even that to the point where they may get away with outlawing everything except a rusty old flintlock and a one shot pistol that you load with a powder horn and a ramrod.
In addition, the states might now try to outlaw anything that isn't "type accepted". We're not out of the woods yet by a long shot.
When the Communications Act of 1934 was passed, which stated that the airwaves belonged "to the people", did it secure our rights to the public airwaves?
Seen any "people owned" television networks or even local stations lately?
Even radio amateurs are being told what they can use on the spectrum, with "type acceptance" rules limiting what they can build and use on certain frequencies and under what type of signal format they can be used on.
So while you can still build your own six meter AM rig, you're not allowed to construct your own 70cm OCDM transceiver because type acceptance rules won't allow it.
The point I am getting at is, if you decide you're going to craft your own firearms you MIGHT run up against some obscure state or local law that says "yeah sure we allow you to own firearms...THIS KIND ONLY"
(Rusty flintlock and old derringer with a powder horn)
They might also try an end run by outlawing most forms of ammunition too.
Five to four. That says an awful lot about the moral makeup of this country.
An awful lot of folks think that we need a nanny state that tells us what we can and cannot do, and a smaller but way more powerful group believes that they can undercut today's ruling by chipping away at the sides and bottom of it till it becomes a ruling in name only, just like the Fourth Amendment.
Vigilance and determination, and a never-ending resolve to flesh out and clearly define, by whatever means is necessary, the very fiber and core of our rights, not only in the letter of the law but in the spirit of it too.
It ain't over. We've won for now but it still ain't over.
Jeff H in Occupied TX