Weapons of War

The civilian AR-15 is a semiautomatic rifle with military lineage. Calling it a “weapon of war” supplies a label, not a complete technical description or a constitutional argument.

In Everytown for Gun Safety’s amicus brief supporting the challenged firearm bans in Viramontes v. Cook County and Grant v. Higgins, Its opening describes the prohibited firearms as “designed for the battlefield,” and its conclusion invokes “weapons of war.” Those phrases deserve scrutiny, especially when they accompany an argument that historical restrictions on armed groups justify modern restrictions on individual firearm possession. [1]

Military lineage is not the same as military configuration

The AR designation comes from ArmaLite, not “assault rifle.” The AR-10 preceded the smaller AR-15; Colt acquired the AR-15 rights in 1959, and military adoption followed under the M16 designation. Civilian semiautomatic versions entered the market in the 1960s. [2]

Civilian AR-15s and military rifles in the same family share substantial engineering. Pretending otherwise would be inaccurate. But the differences also matter.

Civilian semiautomatic AR-15	Military select-fire M4/M16 variants
Fires one shot per trigger pull	Offers semiautomatic fire plus burst or automatic fire, depending on the model
Does not provide a burst or automatic setting	Provides an additional firing capability unavailable on the ordinary civilian version
Commonly configured for civilian sporting, recreational, or defensive purposes	Configured and issued for military requirements

Army specifications expressly identify the M4 and M16A4’s burst and semiautomatic capabilities. That is a substantial functional distinction from a semiautomatic-only civilian rifle. [3]

The honest description is neither “completely unrelated” nor “the same weapon.” They share a design family, with meaningful differences in available firing modes and configuration.

Military ancestry also does not make every inherited feature undesirable. Reliability, durability, and ease of handling are useful to civilian owners too. The relevant questions concern a feature’s actual function and the justification for regulating it.

The musket problem

There is a historical irony in the phrase “weapon of war.” The musket was unmistakably a weapon of war when the Second Amendment was ratified. Its battlefield role did not prevent muskets from also being civilian arms. [4]

If military lineage alone disqualifies a firearm from constitutional protection, that reasoning reaches the very kinds of arms familiar to the founding generation.

This observation does not establish that every military weapon is constitutionally protected. It establishes something narrower: military ancestry alone cannot settle the question.

A street car and its racing namesake

Think of a Chevrolet Monte Carlo and its NASCAR counterpart. Sharing a name and a recognizable appearance does not make a showroom car a race car.

The analogy has limits. A NASCAR vehicle differs much more extensively from its street namesake than an AR-15 differs from an M4. Still, it illustrates the classification problem: association with a specialized activity does not make every related civilian product equivalent.

If someone proposes a ban, they should identify the relevant characteristics and explain why those characteristics justify it. The association cannot do all the work.

Everytown’s historical analogy

Everytown’s argument is more substantial than its rhetoric. It contends that mass violence historically depended largely on armed groups, whereas modern firearms allow individuals to inflict comparable violence. Historical restrictions on those groups, it argues, support modern restrictions on the weapons that concentrate that force in one person. Its examples include riot laws, unlawful-assembly restrictions, and prohibitions on unauthorized military organizations. Some operated before violence occurred. [1, pp. 9–24]

That is a creative analogy. But what, exactly, triggered the historical restriction?

The examples are not interchangeable. Some concerned violent or tumultuous activity. Others concerned gatherings under circumstances threatening public peace. Private-militia laws could prohibit unauthorized military organization or armed drilling and parading. [1, pp. 9–21]

The constitutional question is whether those additional circumstances can simply disappear from the modern analogue.

Why does authority to restrict a threatening assembly or unauthorized military organization establish authority to prohibit an individual’s peaceful possession of a particular rifle?

A homeowner keeping a rifle has not thereby joined a riot, threatened the public, or organized a private army. The proposed analogy must explain why those differences do not matter.

Try that reasoning with a cell phone

Consider this hypothetical argument:

“Historically, governments could prohibit people from gathering to threaten and intimidate others. Today, one person with a cell phone can deliver threats and intimidation on a comparable scale. Therefore, governments can prohibit everyone from owning cell phones—even people who use them peacefully.”

The conclusion exposes the missing step. Authority to prohibit threatening activity does not automatically establish authority to prohibit possession of a tool capable of enabling it.

A phone and a rifle plainly have different capabilities and risks. This analogy tests the reasoning; it does not claim the objects are equivalent. If those differences justify different treatment, proponents must explain how. Merely restating the public-safety objective does not complete the argument.

New technology still requires a comparable justification

Everytown has a legitimate response: constitutional analysis must accommodate technological change. Bruen allows a more nuanced historical inquiry for new technological or societal problems, and Rahimi confirms that a modern law does not require an identical historical predecessor. [5, 6]

But Rahimi also emphasizes how and why a law burdens the right. A permissible purpose does not automatically validate a restriction extending beyond its historical foundations. [6, pp. 7–8]

That is where I find Everytown’s analogy unpersuasive. Preventing mass violence explains the objective. It does not, by itself, explain why restrictions tied to particular collective activities justify a ban reaching peaceful individual possession.

Nor is leaving other firearms available a complete answer. In Heller, the Court rejected the argument that allowing long guns saved a handgun ban. Whether the rifles challenged here receive protection still requires analysis, but the availability of alternatives cannot decide the issue by itself. [7, p. 629]

Keep the terms honest

A firearm cannot form intent or threaten someone independently. A person supplies the intent and conduct. Its physical capabilities matter, but capability and culpability are different questions.

The AR-15’s role in serious crimes deserves honest examination. So do its lawful uses. Neither examination benefits from treating a slogan as a substitute for identifying the weapon, its capabilities, the historical evidence, and the constitutional limits on government power.

Everytown offers an argument the Court must evaluate alongside the respondents’ other historical claims. Rejecting this analogy would not dispose of every defense of the bans. But this analogy has a specific gap: it carries forward the historical restriction while leaving behind important conditions that triggered it.

And “weapon of war” does not close that gap. The musket reminds us why.

Sources

1. Everytown for Gun Safety amicus brief, October 2026, especially printed pp. 1, 9–24, and 30.
2. 1968 Congressional Record, discussion of AR-15 development and Colt’s acquisition; Smithsonian National Museum of American History, Colt AR-15 Model SP1, dated 1964.
3. U.S. Department of Defense specifications: M4 and M16A4.
4. National Park Service: Black Powder Weapons of the Southern Campaign and The Militia and Minute Men of 1775.
5. New York State Rifle & Pistol Association v. Bruen (2022), discussion of technological change and historical analogies.
6. United States v. Rahimi (2024), majority opinion pp. 7–8.
7. District of Columbia v. Heller (2008), p. 629.