Connecticut’s “Convertible Pistol” Ban: The Next Step in the Precursor Playbook

Austin Reville
Mar 1
4 min read

For years, the Second Amendment community has warned that no handgun is ever truly “safe” from the prohibitionist agenda. First it was size. Then materials. Then features. Then magazine capacity. Then color and cosmetics. Now? The latest target isn’t what a handgun is — but what it could become.

At 2 If By Sea Tactical, we watch things well beyond just Southern Minnesota, we’re watching closely as Ned Lamont pushes legislation in Connecticut that mirrors California’s controversial Glock ban.

What Connecticut’s HB5043 Would Do

Governor’s Bill HB5043 would criminalize the sale, distribution, or possession for sale of what it calls a “convertible pistol.”

Violations would be classified as a Class D felony, punishable by:

Up to five years in prison
A $5,000 fine

The bill specifically targets semiautomatic handguns that could theoretically be converted into fully automatic firearms.

But here’s the key point:

It is already illegal under federal law to convert a pistol into a machine gun.
It is already illegal to possess the conversion devices.
It is already illegal in Connecticut to manufacture or transfer machine guns unlawfully.

So what is this bill really banning? Not conduct. Not an existing illegal device. It bans potentiality. We have been saying for a while that increasingly these gun ban bills are ascribing a potential criminal act to the user that either they have yet to take, or if we are being honest, never will take nor have even contemplated.

The Rise of “Precursor” Prohibitions

This legislation follows a model pioneered in California, where Governor Gavin Newsom signed a law prohibiting the sale of so-called “machinegun-convertible pistols,” scheduled to take effect July 1, 2026. Under that framework, the firearm itself — even though it is legal and in common use — becomes suspect because it could be unlawfully modified.

Gun rights organizations, including the National Rifle Association, the Firearms Policy Coalition, and the Second Amendment Foundation, filed suit in Jaynes v. Bonta, challenging California’s law. The constitutional argument is straightforward.

The Heller Standard Still Applies

In District of Columbia v. Heller, the U.S. Supreme Court held that the Second Amendment protects firearms “in common use” for lawful purposes. Handguns are the most popular firearm chosen for self-defense in America. That fact is not up for debate — it is settled constitutional law.

The Court also made clear that only weapons that are both “dangerous and unusual” may be banned. Semi-automatic pistols like Glock handguns are neither. States cannot sidestep this limitation by rebranding common firearms as “raw material” for illegal ones. If that logic were allowed to stand, there would be no limiting principle. By that reasoning:

Any rifle could be banned because it could be misused.
Any magazine could be banned because it could be stolen.
Any gun owner could be treated as a criminal-in-waiting.

That is not how constitutional rights work.

The Slippery Slope Is Not Theoretical

We are already seeing precursor logic spread:

Bans on unfinished receivers.
Regulation of components and accessories.
Efforts to criminalize possession based on speculative misuse.

This approach shifts focus away from criminals who commit violent acts and instead targets neutral conduct and lawful ownership. Instead of punishing violent crime, policymakers are attempting to criminalize lawful products because of hypothetical future misuse. There is no obvious stopping point if this standard is accepted.

Why This Matters in Minnesota

Even though this proposal is in Connecticut, we’ve seen how quickly policy trends migrate across state lines. We are already fighting sweeping semi-auto bans and magazine bans here in Minnesota. The precursor model is simply the next iteration. If courts allow bans based on theoretical conversion, what prevents future legislation from targeting:

Common AR-pattern rifles
Standard-capacity magazines
Replacement parts
Aftermarket triggers

The logic would be identical. Constitutional rights cannot be regulated out of existence by redefining everyday products as “precursors.” We will continue monitoring these developments nationwide because what starts in California or Connecticut often ends up proposed elsewhere.

The Second Amendment does not protect “only the guns politicians approve of.” It protects the arms chosen by the American people for lawful purposes. And we intend to keep defending that principle. Keep fighting for your rights no matter the state in which they are being attacked. We must all fight together, for together we are a large coalition here in the United States. Stay informed and stay vigilant. We here at 2 If By Sea Tactical will continue to bring you full coverage of all things 2A.Top of Form

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Here at 2 If By Sea Tactical we strive to bring you the best experience in the firearms world. As we continue to grow the media arm of 2 If By Sea, make sure you keep tuning in to our Youtube and Rumble channels and right here at “The Patriot’s Almanac” to stay informed on the latest happenings in the firearm world! But we are not lawyers, so this isn't legal guidance. We are proud to be Southern Minnesota source for all things 2A.