There's a fallacy here.
When you REPLACE the fixed-stock of a semi-automatic weapon with a bump-stock, this converts it into a fully-automatic machine gun. Now if someone were to REPLACE the original sear in an AR-15 with an auto-sear, it would convert it into something very similar to an M16, that is, a fully-automatic machine gun.
Now what's the difference if in one case you REPLACED the stock, and you can now fire in a full-auto mode? Or if you REPLACED the sear, and you can now fire in a full-auto mode? What's different here?
In the second case, the law is very clear, and it's been backed-up by the courts, replacing the sear violates federal law. But now the Court is telling us that replacing a different part of the same exact weapon, which results in the same exact outcome, that's legal.
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