No, the Court says it only applies to that specific rifle/pistol combo kit, not the ATF. The Court's ruling was very specific. It did not cover all firearms, just those specifically mentioned.
That is absolutely not true and is the ATF interpretation of the case because that favors thier agenda.
The way things are done in the Supreme Court is they discuss the topic at hand. They make a decision that then sets precedent on the topic at hand in general.
The opinion of the Supreme Court in the Thompson case is about firearm parts that can be made into legal firearms, but could also be assembled into an NFA item and whether the benefit of the doubt applies that the intended purpose is the legal unrestricted purpose or whether mere possession of parts with the capability to be assembled into an NFA item constitutes possession of an NFA item.
If you feel otherwise show it in the Supreme Court decision text. Then we can compare it to a long list of other Supreme Court decisions and review how they talk about something and whether it was that specific thing or the type of item in general as it pertains to the law.
The ATF did not like the landmark decision so they decided to just say after the fact that it was not a landmark decision and did not apply to anything except that one firearm. That is not how Supreme Court decisions have worked in the past.
Essentialy saying "we lost, but here is how
we define the loss _______". They then choose to interprete it in a way that has no actual effect on them or how they conduct thier affairs in the future.
By your conclusion on how the Supreme Court decisions work I guess the Jim Crow south could have just said Brown v. Board of Education only applied to that specific school in question. That it had no impact on any other school, except those specificly in question. That segregation could continue everywhere else except at those specificly referenced schools the Supreme Court addressed.
But that is not the way the court works, not on that issue and not on the Thompson issue. What was being reviewed was the application of the law in question as it pertained to that type of situation, a combination of parts that could be used to assemble restricted or unrestricted firearms, not simply the item itself.
The only one with a view remotely similar to the ATF interpretation is the dissenting view, the one that did not prevail and does not set legal precedent.
What the ATF chose to do is essentialy apply the actual case to nothing since that firearm and kit is not even made, and apply the dissenting view to all other firearms.
Ignoring the Supreme Court by telling people they are actualy following the ruling in the way they interprete it.
Specificly what was being dealt with:
"
The Court of Appeals for the Federal Circuit reversed, holding that a short-barreled rifle "actually must be assembled" in order to be "made" within the meaning of the NFA. 924 F.2d 1041, 1043 (1991). The Court of Appeals expressly declined to follow the decision of the Court of Appeals for the Seventh Circuit in United States v. Drasen, 845 F.2d 731, cert. denied, 488 U. S. 909 (1988), which had held that an unassembled "complete parts kit" for a short-barreled rifle was in fact a short-barreled rifle for purposes of the NFA. We granted certiorari to resolve this conflict. 502 U. S. 807 (1991)."
That Court of Appeals for the Federal Circuit decision was AFFIRMED! Meaning the Supreme Court of the United States hold it as valid, and they then give specifics in thier various opinions, but only the majority opinion sets legal precedent, the dissenting opinion is just for formal record.
What decision were they affirming? The Federal Circuit one:
a short-barreled rifle "actually must be assembled" in order to be "made" within the meaning of the NFA."
A combination of parts that can be used to create legal completed firearms are not an NFA item just because they could also be assembled into an illegal violation of the NFA according to the Thompson case. More specificly even an item intended to go from pistol to rifle and back with a swapping of stock and barrel to give proper overall length and barrel length and the resulting great "utility" is not an NFA item. The "utility" spoken of by the court addresses the great potential and usefulness of an item that can be both a pistol and a rifle to fit different situations at the whim of the shooter.
Now clearly since the ATF feels the way they do and they are tasked with enforcement there is a situation that could be very unpleasant for someone following the law. One that would require a lot of legal counsel to resolve an issue the Supreme Court already resolved. The ATF has therefore in fact nullified the SCOTUS decision in practice, but not in actuality.
Here is the text for you on the Thompson case:
http://supreme.justia.com/us/504/505/case.html