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I'm still eager to know where in our Constitution has the federal government been delegated power to enforce the federal law the Supreme Court made reference to.

I think our founders were 100% correct in specifically forbidding the federal government from adopting and enforcing federal legislation restricting the right to keep and bear arms. Cuba comes to mind!
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JWK

Our Founders intended ordinary citizens to keep and bear arms [a contemporary firearm used by foot soldiers] so they would be ready and able to defend themselves against a despotic government if necessary. The AR-15-semi is a civilian version of the United States military’s M16 and ought to be kept by ordinary citizens to defend against a tyrannical government.