And you get all that out of a court opinion you're too lazy to name?

If you're referring to Printz vs. United States, the case had much less to do with gun control, than the usual seesawing over who has more power in a federalist system. Considering that the case only dealt with interim sections of the act, its relevance outside of setting precedents for state's rights is exceedingly limited.
Sometimes I feel like my shadow's casting me