A federal judge in Texas has permanently blocked the Biden administration's ATF rule targeting homemade firearms, ruling it unconstitutional on both Second Amendment and Fifth Amendment grounds, a decisive win for gun-rights groups after years of litigation.
Chief U.S. District Judge Reed O'Connor, a George W. Bush appointee sitting in the Northern District of Texas, issued a permanent injunction Tuesday in favor of Defense Distributed and the Second Amendment Foundation, the Daily Caller News Foundation reported. O'Connor found the ATF's "frame or receiver rule" violated the Fifth Amendment as unconstitutionally vague and the Second Amendment by prohibiting Americans from acquiring the means to manufacture their own firearms.
The ruling caps a legal fight that stretches back to 2022, when the Biden administration first enacted the regulation. O'Connor had signaled his skepticism from the start, and his final opinion did not hold back about why the rule fails constitutional scrutiny.
In his written opinion, O'Connor rejected the government's attempt to justify the regulation by analogy to historical firearms restrictions. He wrote that the rule does not merely lack historical support, it contradicts it outright.
From the opinion:
"The Final Rule does not merely lack supporting analogues. It contradicts the actual historical tradition of personal gunsmithing. Self-manufacture of firearms in America was common and indeed foundational to establishing our Nation."
That framing matters. Under the Supreme Court's 2022 framework for evaluating gun regulations, the government must show that a modern restriction is "consistent with this Nation's historical tradition of firearm regulation." O'Connor concluded the Biden ATF rule flunked that test.
William Sack, the Second Amendment Foundation's senior director of litigation, told the Daily Caller News Foundation that the court specifically rejected the government's effort to compare the ghost gun rule to old gunpowder storage and safe storage laws.
"The court found that it was not analogous to compare gunpowder storage, safe storage laws with a crime reduction bill, that they were not one and the same, that they were not analogous."
The distinction is critical. Gunpowder storage laws addressed public safety hazards, fire and explosion risk. The ATF's frame or receiver rule, by contrast, attempted to redefine what counts as a firearm in order to restrict who can build one. O'Connor treated those as fundamentally different regulatory purposes.
O'Connor's Fifth Amendment analysis may prove just as consequential. He found the rule failed to give ordinary people fair notice of what conduct it prohibited, the textbook definition of a void-for-vagueness problem under the due process clause.
O'Connor wrote bluntly: "Because the Final Rule fails to provide appropriate guidance, it is void for vagueness."
Sack put the problem in plain terms. The rule tried to define the point at which a partially manufactured frame or receiver became a regulated "firearm," but the standard it created was hopelessly subjective.
"If you look back at the rule itself, the determining factors, I should say, as to what point a partially manufactured frame or receiver became something that fell under the definition of firearm, the rule established like a multi-factor, non-exclusive, non-dispositive test that essentially boils down to, we know it when we see it."
An "I know it when I see it" standard from a federal regulatory agency is not a standard at all. It hands enforcement discretion to individual ATF agents with no clear line separating lawful conduct from a federal felony. That is precisely the kind of arbitrary enforcement power the Fifth Amendment exists to prevent.
The ruling follows a pattern of federal courts striking down sweeping gun regulations that fail to meet constitutional standards, a trend that has accelerated since the Supreme Court reinforced the individual right to keep and bear arms.
O'Connor's skepticism of the ATF rule is well documented. In September 2022, the same year the Biden administration enacted the regulation, he issued a preliminary ruling finding that the ATF had likely usurped congressional authority by redefining what constitutes a firearm through rulemaking rather than legislation.
By June 2023, O'Connor went further, ruling that the regulations exceeded the ATF's statutory authority. Tuesday's decision adds constitutional grounds on top of the earlier statutory objections and converts the injunction into a permanent one.
The Biden administration enacted the rule in 2022, in part as a response to the mass shooting at Robb Elementary School in Uvalde, Texas, where a gunman killed 19 children and two teachers before Border Patrol agents stormed the classroom and fatally shot him. The regulation targeted so-called "ghost guns", firearms assembled from kits or parts that lack serial numbers, making them harder for law enforcement to trace.
But the connection between the Uvalde massacre and homemade firearms was always tenuous. The shooter in that case did not use a ghost gun. The administration used the public horror of Uvalde to push a regulation that addressed a different problem, and did so through executive rulemaking rather than asking Congress to pass a law. O'Connor's rulings, taken together, say the ATF lacked both the statutory authority and the constitutional license to do what it did.
Other recent court decisions have similarly pushed back against regulatory overreach in the firearms space. A landmark ruling on suppressor transfers marked the first time in over nine decades that such transfers occurred without federal registration, another sign that courts are taking a harder look at longstanding gun regulations.
The legal landscape around ghost guns is not one-sided. The Supreme Court previously upheld a Biden administration ghost gun regulation in a 7-2 decision. Four conservative justices, Chief Justice John Roberts and Justices Amy Coney Barrett, Neil Gorsuch, and Brett Kavanaugh, joined the three left-wing justices in the majority.
But O'Connor's ruling addresses different constitutional claims. The Supreme Court case dealt with whether the ATF's regulatory authority extended to ghost gun components. O'Connor's permanent injunction rests on the Second Amendment's protection of the right to manufacture firearms and the Fifth Amendment's requirement that laws give clear notice of what they prohibit. Those are distinct constitutional questions, and O'Connor answered both against the government.
The Department of Justice did not immediately respond to a request for comment. Whether the government will appeal the permanent injunction remains an open question.
Meanwhile, the broader debate over gun regulation continues to play out in courtrooms and statehouses across the country. Strict gun-control regimes have not prevented violence in jurisdictions that adopted them, as illustrated by recent shootings in states with some of the nation's tightest firearms laws. And calls from public figures to eliminate guns entirely continue to collide with constitutional reality.
O'Connor's ruling is a reminder that the Constitution does not bend to regulatory convenience. When an agency writes a rule so vague that enforcement comes down to "we know it when we see it," and so sweeping that it contradicts a founding-era tradition of Americans building their own firearms, courts exist to say no.
