Switchblades Are Protected Arms: Historical Carry Laws Do Not Justify the Federal Interstate Supply Ban

1. Introduction

Knife Rights v. Blanche extends the Second Amendment’s protection of arms to switchblade knives and to the activities necessary to acquire them. Its central holding is that historical restrictions on carrying concealed weapons do not, without more, justify a federal prohibition targeting the interstate supply of those weapons.

The plaintiffs—Knife Rights, Incorporated, two Texas businesses, and five individuals—challenged two provisions of the Federal Switchblade Act (FSA). The defendants were Acting U.S. Attorney General Todd Wallace Blanche and the United States Department of Justice. The plaintiffs sought declaratory and injunctive relief through facial constitutional challenges, rather than challenges limited to particular applications of the statute.

The challenged provisions serve different functions:

• 15 U.S.C. § 1242 criminalizes knowingly introducing, manufacturing for introduction, transporting, or distributing switchblade knives in interstate commerce, subject to statutory exceptions.
• 15 U.S.C. § 1243 restricts manufacture, sale, and possession within specified federal territories and jurisdictions, including Indian country and the United States’ special maritime and territorial jurisdiction.

The retail plaintiffs wished to acquire and sell automatic-opening knives. Several individuals wished to purchase or transport them for self-defense and ordinary practical purposes. Rodney Shedd, who lived on Muscogee Nation tribal land, wished to reacquire a switchblade he had relinquished before moving there.

The opinion places the FSA’s 1958 enactment against contemporary fears of juvenile delinquency, illustrated by the switchblade imagery in Rebel Without a Cause. Congressional investigations linked switchblades to youth crime and identified interstate commerce as a means of circumventing state restrictions. Congress consequently targeted the supply chain. The constitutional question, however, was not whether Congress perceived a genuine social problem, but whether its chosen response was consistent with the Second Amendment.

2. Summary of the Opinion

The Fifth Circuit held that the plaintiffs had standing to challenge both provisions. On the merits, it found § 1242 unconstitutional but rejected the facial challenge to § 1243.

Accordingly, the court reversed dismissal of the § 1242 claim, affirmed dismissal of the § 1243 claim on a different ground, and remanded. The decision does not invalidate the entire FSA, and the appellate opinion itself does not prescribe the final terms of an injunction.

3. Analysis: Legal Reasoning and Controlling Precedents

A. The constitutional framework: text first, historical justification second

District of Columbia v. Heller, 554 U.S. 570 (2008), supplies the foundational understanding of the right. The Second Amendment codifies a pre-existing individual right, and “Arms” is not synonymous with firearms. The historical definition quoted in Heller encompasses objects carried for defense or used to strike another. That definition readily accommodates knives.

Heller also anchors the right in self-defense without limiting every protected use to that purpose. The opinion therefore treats evidence of hunting, outdoor recreation, and everyday utility as relevant to the lawful character of switchblade ownership rather than demanding proof that each knife is possessed exclusively for defensive use.

The governing methodology comes from New York State Rifle & Pistol Association, Inc. v. Bruen. First, courts ask whether the Second Amendment’s text covers the relevant people, arms, and conduct. If it does, protection is presumed, and the government must demonstrate consistency with the Nation’s historical regulatory tradition. Wolford v. Lopez reinforces the three components of the initial textual inquiry: protected persons, protected arms, and keeping or bearing those arms.

At the historical stage, United States v. Rahimi, 602 U.S. 680 (2024), requires attention to the principles reflected in earlier laws rather than a search for an identical historical statute. Nevertheless, both the justification for regulation—the “why”—and the mechanism and extent of its burden—the “how”—matter. A legitimate regulatory objective cannot rescue a restriction that burdens the right in a historically unsupported way.

United States v. Hemani similarly identifies these two dimensions as central to evaluating historical analogues. The Fifth Circuit’s decisive move is to insist that they remain separate inquiries: evidence supporting a law’s purpose does not necessarily support its means.

B. Switchblade knives fall within the protected category of arms

The court first found no dispute that the individual plaintiffs belonged to “the people” protected by the Amendment. It assumed, without deciding, that the businesses and Knife Rights also fell within that category. The decision therefore should not be treated as conclusively resolving the independent Second Amendment status of corporations or advocacy organizations.

Turning to the weapons, the court relied on the historical defensive use of knives, the existence of spring-operated blades, and the later commercial production of switchblades. It also cited evidence that millions of automatic-opening knives now exist in the United States and serve lawful purposes. Together, those materials supported its conclusion that switchblades are arms in common use, not an unprotected category merely because of their opening mechanism or cultural reputation.

The historical discussion draws support from Knife Rts. v. Bonta, 182 F.4th 797 (9th Cir. 2026), specifically Judge Tung’s dissent from denial of rehearing en banc. The opinion uses that writing for its historical survey; it is not presented as a controlling majority holding.

Ass'n of N.J. Rifle & Pistol Clubs, Inc. v. Att'y Gen. N.J., 183 F.4th 211 (3d Cir. 2026) (en banc), provides an analogy concerning widespread ownership and lawful uses of weapons. The Fifth Circuit also cites Justice Kavanaugh’s writing respecting denial of certiorari in Snope v. Brown for the significance of ownership by millions of law-abiding citizens. That separate writing supports the court’s reasoning but is not itself a Supreme Court merits holding.

Importantly, the court did not establish a numerical threshold for common use. Nor did it resolve whether that question belongs at the textual stage or the historical stage: the government’s position failed under either placement.

C. Protected possession implies meaningful access to arms

Section 1242 does not simply prohibit possession. It restricts the channels through which switchblades are manufactured for interstate introduction, transported, and distributed. The court nevertheless held that the Amendment reaches this conduct because possession and carrying depend on acquisition.

The principal Fifth Circuit precedent is Reese v. Bureau of Alcohol, Tobacco, Firearms, & Explosives, 127 F.4th 583 (5th Cir. 2025). Although “purchase” and “sale” do not appear in the Amendment, Reese recognizes that the right to keep and bear arms implies a right to acquire them. Knife Rights carries that logic into the supply chain: purchasing requires some ability to manufacture, transport, and distribute.

Ezell v. City of Chicago supplies the practical premise that a right to possess arms would have little meaning without a corresponding right to acquire them. Justice Thomas’s concurrence in Luis v. United States supports the interpretive principle that an expressly protected right may carry necessary subsidiary protections. The court also invokes the necessary-predicate canon discussed by Scalia and Garner.

United States v. Vlha reinforces the connection between manufacturing and individuals’ ability to purchase arms. Justice Thomas’s dissent from denial of certiorari in Snope v. Brown supplies additional support for treating such restrictions as regulation of arms-bearing conduct.

The resulting rule is not that every commercial regulation is unconstitutional. It is that a restriction cannot escape Second Amendment review merely because it operates upstream of possession.

D. Why the district court’s “effective ban” approach failed

The district court had emphasized that switchblades remained available through intrastate commerce. Because § 1242 did not produce a de facto prohibition on possession, it regarded the law as permissible.

The Fifth Circuit rejected that shortcut. The relevant inquiry was not simply whether alternative acquisition channels survived, but whether the regulated conduct fell within the Amendment and, if so, whether historical tradition justified the burden.

McRorey v. Garland, 99 F.4th 831 (5th Cir. 2024), did not authorize dispensing with Bruen. The appellate court expressly preserved McRorey’s correctness, including its discussion of potentially lawful ancillary regulations such as background checks. The error lay in treating the absence of a possession ban as dispositive rather than applying the constitutional framework to this particular restriction.

E. Concealed-carry precedents did not establish a tradition of supply bans

The government’s historical case centered on concealable weapons and their perceived danger. The court assumed for argument’s sake that this history could support the government’s regulatory purpose. It did not decide that the government had satisfied the “why” inquiry.

Instead, the challenge failed on “how.” The principal historical cases concerned restrictions on wearing or carrying weapons, not restrictions resembling § 1242’s interstate supply prohibition.

This distinction is substantive. A restriction on concealed carrying can leave ordinary acquisition available. A supply-chain restriction burdens access before carrying occurs. Historical concern about the same general class of weapons therefore does not automatically establish comparable constitutional burdens.

F. Isolated historical sales restrictions were insufficient

The government also cited Kopel and Greenlee’s historical survey of arms restrictions. Among nearly two hundred statutes addressing daggers, dirks, and sword canes, the court identified only two sufficiently analogous restrictions on selling or transferring bladed weapons: an 1837 Georgia law and an 1881 Arkansas law.

Those laws showed that sales restrictions were historically conceivable, but not that they represented an established tradition. Under Bruen and Wolford v. Lopez, isolated local rules cannot necessarily justify modern restrictions. Drummond v. Robinson, quoted through Bruen, supplies the warning against validating contemporary laws through remote similarities to historical outliers.

The court scrutinized the source material rather than accepting its classifications. One apparent additional transfer restriction proved, on examination of the cited statute, to regulate carrying instead. This correction mattered because the government already had little directly comparable evidence.

Historical restrictions on sales to minors were more numerous, but the court found them mismatched in purpose. Their age-specific concern did not justify § 1242’s categorical restriction. Although juvenile delinquency helped motivate the FSA, a restriction applying generally is not equivalent to a prohibition limited to minors.

Finally, United States v. Lopez explains a structural difference between state and federal authority: states possess general police powers, while Congress does not. Congress therefore used its commerce power to enact § 1242. The Fifth Circuit did not invalidate the law under the Commerce Clause; it held that the law still had to satisfy the Second Amendment. Differences in legislative authority did not cure the historical mismatch.

G. Section 1243 failed as a facial challenge, not for lack of standing

The court distinguished the existence of jurisdiction from success on the constitutional claim. Shedd could sue, but his standing did not establish that every application of § 1243 was unconstitutional.

United States v. Salerno, 481 U.S. 739 (1987), supplies the demanding facial-challenge standard: the plaintiffs had to establish that no set of circumstances existed under which the provision would be valid. United States v. Rahimi confirms that this standard applies in the Second Amendment context.

Moody v. NetChoice emphasizes that choosing facial litigation carries a substantial burden. The opinion contrasts that burden with the First Amendment overbreadth approach discussed in Ams. for Prosperity Found. v. Bonta, under which a sufficiently substantial number of unconstitutional applications can sometimes justify facial relief. That special approach did not govern this case.

The government identified applications involving courthouses and other sensitive federal settings. Heller and Bruen recognize the constitutional legitimacy of restrictions in sensitive places, including government buildings. These authorities defeated the plaintiffs’ claim that § 1243 lacked any lawful application.

The plaintiffs did not seriously address the governing standard in their opening brief, and their reply offered an unsupported alternative description of a facial challenge. The court accordingly affirmed dismissal without deciding whether § 1243 could constitutionally prohibit Shedd’s possession in his particular residential circumstances.

The decision thus preserves an important distinction: the government’s burden to justify a covered arms restriction historically does not eliminate a plaintiff’s separate burden to establish the breadth required for facial invalidation.

4. Additional Precedents Cited and Their Influence

A. Review standards and the litigation’s procedural history

Sw. Airlines Pilots Ass'n v. Sw. Airlines Co. establishes de novo review of dismissal decisions. Together with Fort Bend Cnty. v. U.S. Army Corps of Eng'rs, it also supports addressing jurisdictional objections before merits-based dismissal arguments. Reese v. Bureau of Alcohol, Tobacco, Firearms, & Explosives confirms de novo review of constitutional questions.

United States v. Chacon permits affirmance on any basis supported by the record. That principle is especially important to § 1243: the Fifth Circuit rejected the district court’s standing analysis yet affirmed dismissal because the facial challenge failed.

Knife Rts., Inc. v. Garland, identified as Knife Rts. I, records an earlier challenge to § 1242 dismissed for lack of standing; the plaintiffs did not appeal. Knife Rts., Inc. v. Bondi, identified as Knife Rts. II, is the decision under review. It recognized standing under § 1242, denied standing under § 1243, and rejected the § 1242 claim on the merits. These decisions explain the litigation’s progression rather than supplying the controlling constitutional rule.

B. The basic requirements of standing

N.A.A.C.P. v. City of Kyle and Steel Co. v. Citizens for a Better Env't require the court to verify jurisdiction independently, even after the government stops contesting standing. The parties’ agreement cannot create federal jurisdiction.

Warth v. Seldin frames standing as the question whether a litigant is entitled to judicial resolution. Lujan v. Defs. of Wildlife supplies the three constitutional elements: injury in fact, traceability, and redressability. Simon v. Eastern Ky. Welfare Rts. Org., quoted through Lujan, informs the traceability requirement. TransUnion LLC v. Ramirez makes standing claim-specific, requiring separate attention to §§ 1242 and 1243.

Traceability and redressability were straightforward here: the federal defendants would enforce the provisions, and the requested relief would address the threatened enforcement. The substantial dispute concerned injury before prosecution.

C. Pre-enforcement injury and credible threats

Speech First, Inc. v. Fenves, drawing on Susan B. Anthony List v. Driehaus, supplies the three-part pre-enforcement test: intended conduct arguably implicating a constitutional interest, conduct arguably prohibited by the challenged law, and a substantial threat of enforcement. Nat'l Press Photographers v. McCraw places the burden of establishing those elements on the plaintiffs.

Babbitt v. United Farm Workers Nat'l Union, citing O'Shea v. Littleton, requires a realistic danger of direct injury. But Babbitt, quoting Steffel v. Thompson, also makes clear that a person need not undergo arrest or prosecution before challenging a law that deters constitutionally protected conduct.

Umphress v. Hall was particularly influential. It recognized the significance of an enforcement authority’s refusal to disavow future action. Here, the government expressly declined to disavow enforcing either provision. For § 1242, that position was reinforced by actual past prosecutions.

Speech First, Inc. v. Schlissel supports the relevance of the facial-versus-as-applied distinction to standing. N.H. Right to Life PAC v. Gardner supplies the forgiving credible-threat approach cited through Speech First, Inc. v. Fenves: absent compelling contrary evidence, courts may assume a credible threat in the circumstances described.

For § 1243, Chiles v. Salazar was especially important because it treated the government’s defense of a law and refusal to disavow enforcement as sufficient evidence of a credible threat. Franciscan Alliance, Inc. v. Becerra similarly supports standing where the government repeatedly refuses to disclaim enforcement or has not determined whether to enforce.

Virginia v. Am. Booksellers Ass'n, Inc. confirms that a personalized prosecution threat is unnecessary. Majors v. Abell explains that a threat can be latent in the statute itself. Ezell v. City of Chicago applies comparable reasoning in the Second Amendment setting.

The court nevertheless retained a limiting principle. Younger v. Harris excludes merely imaginary or speculative prosecution risks. Poe v. Ullman was distinguished because the Supreme Court there found insufficient immediacy of enforcement. Here, Shedd alleged a concrete intention to reacquire a prohibited knife, and the government retained the option to prosecute. The absence of known § 1243 prosecutions—against an incomplete historical records background—did not establish abandonment of the law.

D. Which plaintiff needed standing?

Biden v. Nebraska and Rumsfeld v. Forum for Acad. & Institutional Rts., Inc. establish that one plaintiff with standing can suffice for the requested challenge to proceed. That principle allowed Shedd to supply standing for the § 1243 claim. Clinton v. City of New York supported leaving Knife Rights’ organizational standing unresolved once other plaintiffs’ standing was established.

The retailers relied successfully on their own injuries, not their customers’ rights. Under Kowalski v. Tesmer and Powers v. Ohio, third-party standing ordinarily requires both a close relationship and an obstacle preventing the rights-holder from suing. Because customers could bring their own challenges, that alternative theory failed.

E. The unresolved placement of “common use”

The opinion carefully identifies disagreement over where common use belongs within Bruen:

• Nat'l Ass'n for Gun Rts. v. Lamont, Bianchi v. Brown, and United States v. Morgan place the inquiry within the first stage, although their formulations differ. Sealed Appellee v. Sealed Juv. describes the dangerous-and-unusual inquiry as occurring at that stage.
• Ass'n of N.J. Rifle & Pistol Clubs, Inc. v. Att'y Gen. N.J. and United States v. Bridges place the analysis at the historical stage.
• Hanson v. District of Columbia assumes a first-stage placement without deciding it, while Bevis v. City of Naperville assumes a second-stage placement without deciding it.
• Knife Rts., Inc. v. Bonta, 165 F.4th 1330 (9th Cir. 2026), leaves the allocation unresolved. The opinion also cites that decision for the historical association of switchblades with criminal activity in the 1950s.

These authorities map a methodological disagreement; the Fifth Circuit did not resolve it here. Its conclusion rested on the sufficiency of the historical and contemporary evidence of lawful switchblade use under either approach.

F. Constitutional endurance

Finally, McCulloch v. Maryland, quoted through Bruen, supplies the concluding principle that constitutional provisions must endure through changing circumstances. The point is not that modern problems are irrelevant, but that perceived urgency cannot displace the constitutional limits governing the response.

5. Impact and Limits

A. Protection extends beyond firearms

The decision provides a direct Fifth Circuit holding that switchblades qualify as protected arms. It reinforces a functional and historical understanding of “Arms,” rather than one restricted by weapon labels or unfavorable public associations. It does not establish that every knife, weapon, or manner of use is constitutionally protected.

B. Supply restrictions must receive substantive constitutional review

The acquisition analysis may influence future challenges involving manufacture, transportation, distribution, or sales of protected arms. Its important procedural consequence is that governments cannot necessarily avoid historical scrutiny by pointing to surviving possession or intrastate purchasing opportunities.

But the decision does not recognize an unlimited commercial exemption from regulation. The court preserves the possibility of lawful ancillary requirements and leaves their validity to the applicable constitutional analysis.

C. Historical analogies must match the burden, not merely the concern

The opinion strengthens scrutiny of analogies that share a public-safety rationale but regulate materially different conduct. Future litigants must explain why a carry restriction supports a supply restriction, rather than assuming that both concern weapons and are therefore interchangeable.

Its source-checking also illustrates the importance of historical accuracy. A secondary source’s label is not a substitute for examining the underlying law. Conversely, the decision should not be reduced to a numerical rule that two historical statutes can never suffice: their representativeness and substantive fit remain essential.

D. Facial litigation remains strategically demanding

The § 1243 result warns against using a plaintiff’s strong personal circumstances as a substitute for analyzing a statute’s full reach. A possible constitutional claim involving possession at home does not establish invalidity in courthouses or other sensitive settings.

Whether § 1243 is unconstitutional as applied to Shedd remains unresolved. More broadly, the opinion does not comprehensively classify every location identified by the government as sensitive; the existence of supported lawful applications was enough to defeat this facial challenge.

E. The scope of relief remains important

The holding concerning § 1242 is distinct from the final remedial order to be entered on remand. The opinion does not erase § 1243, invalidate unrelated FSA provisions, or determine the validity of separate state or tribal restrictions.

6. Complex Concepts Simplified

Standing

A plaintiff must show a concrete personal stake before a federal court can decide the claim. Being allowed to sue is different from winning.

Pre-enforcement challenge

A lawsuit brought before prosecution. Concrete plans to violate a law and a credible enforcement risk can make waiting for arrest unnecessary.

Facial challenge

A challenge seeking to invalidate a provision across its applications. Under the standard applied here, one constitutional application defeats the claim.

As-applied challenge

A challenge asking whether a law is unconstitutional in the plaintiff’s particular circumstances, without necessarily invalidating it elsewhere.

Historical analogue

An earlier regulation used to assess whether a modern law fits a constitutional tradition. It need not be identical, but its justification and burden must be meaningfully comparable.

“Why” and “how”

“Why” asks what problem a law addresses. “How” asks what conduct it restricts and how substantially. A valid purpose does not automatically validate every method.

Necessary-predicate protection

Protection for activities needed to exercise an express right. Here, meaningful possession depends on acquiring arms through a functioning supply chain.

De novo review

The appellate court decides the legal question independently, without deferring to the district court’s legal conclusion.

Remand

The case returns to the district court for further proceedings consistent with the appellate decision.

7. Conclusion

Knife Rights v. Blanche holds that switchblades are protected arms and that restrictions on their interstate supply implicate the Second Amendment. Historical concealed-carry laws did not justify § 1242’s materially different restriction on acquisition channels.

Equally important, the court preserved the distinction between standing, substantive constitutional protection, and the demanding requirements of facial relief. Section 1242 failed historical review; § 1243 survived this facial challenge because the plaintiffs did not eliminate its constitutional applications. The decision therefore expands protection for access to arms while underscoring the importance of carefully matching both historical evidence and litigation strategy to the precise claim presented.