If you have a mac 11 and the parts to turn it into a machinegun you go to prison if your brother rats you out. I'd bet $ 10 someone was caught fooling around with his sister in law...[8)]
Also-in theory the feds are supposed to be limited in mucking around creating laws that are not a national interest (v. something the states should be left to decide) of course the feds ignore this and pass all kinds of laws that were probably not intended by many of the founding fathers.
The lameo way around this is to claim that the feds are concerned about an issue that effects "interstate commerce." Should the feds have control over whether tractor trailers pulling two trailers are legal, or should each state be able to have a different rule so you could run a tandem rig in Florida, but not on through Georgia? However can the feds prohibit the possession of a gun near a school because violence around schools inhibits learning and less well educated children are a detrimet to the job force and therefore a hindrance to interstate commerce? In some cases the court steps in and says there is no reason for the feds to pass that law, let the states decide whether to do that...does not happen often.
"interstate commerce" is a wonderful catch all to justify federal laws on many issues as it is so hard to prove that it does not apply. The judge in his dissent is saying that altho he has no problem with tossing ole Gary Beuckelaere in a deep dark hole for having a mac 11 and a sear, or whatever, he does not think that the commerce clause justifies the federal law prohibiting the possession of the parts to make a full auto weapon.
Perfectly clear, right? Aren't ya glad you asked? [sleep]