Under a congressional statute known as the Gun Control Act of 1968, “weapons” are subject to federal regulation as “firearms.” Weapons parts kits typically include most or all of the components necessary to build a gun, although the purchaser generally supplies the tools and, if necessary, a magazine.
The ATF argued that such kits are “weapons” and therefore “firearms.”
Strictly speaking, the only issue before the court was whether these kits fit within the statute’s meaning of the word “weapon.” The Second Amendment right to keep and bear arms was not under consideration—at least not directly.
- weapons
- “starter guns”—a particular kind of incomplete weapon
- specifically listed weapon parts: frames, receivers, and mufflers/silencers (more properly called “suppressors”)
- destructive devices
Problems With the Court’s Conclusion
In my view, the majority opinion was erroneous on several levels.First: The foremost rule for reading a statute is to seek the intent of the legislature that adopted it. In the case of the Gun Control Act, you try to reconstruct the intent of Congress when it passed the law in 1968. There does not appear to be any history suggesting that Congress intended to include assembly kits in the definition of “weapon.”
Second: Another rule of interpretation is that in seeking the legislature’s intent, you should examine the normal meaning of key words in the statute at the time the statute was adopted. But the normal 1968 dictionary definition of “weapon” was “an instrument of offensive or defensive combat ... [such] as a club, sword, gun, or grenade.” It did not include unfinished products—which is one reason Congress had to list those components (such as frames) that it did wish to include in the meaning of “weapon.”
Third: In construing a word or phrase in a statute, you also look at the context. Part of the context is the other language around the word or phrase.
As you can see from the portion of the statute quoted above, it does include some components (frames, receivers, suppressors). It also includes one category of incomplete weapon (starter guns). But it leaves out all others. A very well-recognized rule of interpretation tells us that when a law lists certain items, the law implicitly excludes others. Consequently, other components and unfinished instruments—including kits—are not covered.
When passing the 1968 Gun Control Act, Congress could have continued regulation of “parts,” but it specifically chose not to do so. This also tells us that assembly kits are not “weapons” under the Gun Control Act.
Fifth: When construing a statute, you also apply legal rules and definitions that are so common that lawmakers presumably know about them. In VanDerStok, Gorsuch relied on a specific category of words known as “artifact nouns.” But the phrase “artifact noun” was previously unknown to the law—a fact I verified by searching in the best-known legal database. It was not a category of which Congress was necessarily aware.
What the Court Did
In 1968, only experts with specialized equipment could assemble guns. Weapons parts kits, along with the necessary assembly tools, became widespread only after the Gun Control Act was adopted. It appears that the court was trying to update the 57-year-old statute to meet modern conditions.Interpreting the Constitution
The ruling in VanDerStok shows how a court can amend a statute by changing the normal rules for interpreting it.Gorsuch is an outstanding jurist and usually does not make this kind of mistake. However, writers on the Constitution frequently do—that is, they invent new rules of interpretation to “prove” the Constitution says what they want it to say.







