The Trump administration is dismantling more than three dozen federal firearms regulations, ending a zero-tolerance policy against wayward gun dealers, easing scrutiny of stabilizing braces, and clearing a path for some Americans with a history of mental illness to buy firearms, part of what officials call the broadest rewrite of Bureau of Alcohol, Tobacco, Firearms and Explosives rules in the agency's history.

The rollback, executed under President Donald Trump's Executive Order 14206 on Second Amendment rights, was formally launched April 29, when acting Attorney General Todd Blanche and newly confirmed ATF Director Robert Cekada unveiled 34 notices of final and proposed rulemaking.

Officials called it the most comprehensive regulatory reform package in ATF history. Cekada was confirmed by the Senate hours earlier and signed off on the changes within an hour of taking office.

The package raises the legal bar for stripping a federal firearms dealer of a license, requiring evidence that the dealer knew it was breaking the law.

It formally rescinds the Biden-era pistol brace rule, which has already been blocked in much of the country by federal courts.

It narrows the Biden administration's "engaged in the business" rule, which was designed to force more sellers at gun shows and online marketplaces to run background checks, a measure gun-control advocates called a partial closure of the so-called gun show loophole.

Other proposals would allow some Americans previously flagged for mental health reasons or an inability to manage their finances to purchase firearms.

On Friday, the ATF unveiled further changes, including a proposal to trim fingerprinting requirements for National Firearms Act applications.

Under the plan, individual applicants would submit a single fingerprint card instead of two and could verify identity with a photo ID rather than a passport-style photo. The rule is scheduled for publication in the Federal Register on July 6, opening a comment period through Oct. 5.

The administration is simultaneously challenging state gun laws in court.

On Wednesday, the Justice Department sued California over Assembly Bill 1127, which bars sales of Glock-style pistols with a cruciform trigger bar that officials say can be readily converted to fully automatic fire, and over the state's Handgun Roster, which restricts which models may be sold.

It also sued Virginia and the Virginia State Police over Senate Bill 749, which criminalizes the sale or transfer of AR-15-style rifles and magazines holding more than 15 rounds. The department earlier filed similar challenges to semiautomatic rifle bans in the District of Columbia in December and Colorado in May.

Blanche said the rules had been written "without any real understanding of how firearms businesses operate, how lawful gun owners actually handle their firearms, or what truly improves public safety."

Gun control advocates rejected that framing. Kris Brown, president of Brady, told The New York Times the moves take the country "back 100 years" and are "decimating A.T.F.'s ability to regulate this industry."