3D-Printed Guns: Regulators Already Behind

The technology to build a working firearm at home has outpaced every law written to stop it.

Catch up quick:

• A 3D-printed pistol frame costs roughly $6 in filament and takes under an hour to assemble with off-the-shelf metal parts
• The Supreme Court ruled in 2025 that ghost gun kits can be federally regulated—but 3D-printed builds remain largely untouched
• 16 states have moved to criminalize homemade guns; in those states, doing what's federally legal could get you 10 years

State of play: The kit-gun market is effectively dead after last year's Supreme Court ruling. The 3D-printing side of the hobby didn't just survive—it accelerated. Platforms like CTRL PEW provide step-by-step assembly tutorials, and companies like Aves Rails are shipping thousands of Glock-compatible rail kits a month, each one destined for a printed frame.

Alex Holladay, who runs CTRL PEW, walked a reporter through building two guns in a single afternoon in Central Florida—a Glock-style handgun and an AR-15. Neither required gunsmithing experience. The worst mechanical failure of the session was a magazine that needed a minor fit adjustment.

"It empowers everyone. It doesn't matter what your motivation is—be it a competitive shooter or a guy in the suburbs of Chicago who lives in a rough neighborhood and needs to protect his home." — Alex Holladay, CTRL PEW

The legal question: At the federal level, building a firearm for personal use has never been illegal—the Gun Control Act of 1968 didn't change that, and neither did last year's SCOTUS ruling. What the Court settled is narrower: ghost gun assembly kits sold commercially now require background checks and serial numbers. A frame you print yourself sits outside that ruling entirely. For now.

What Idaho owners should know: Idaho has not enacted state-level restrictions on homemade firearms. Building a gun for personal use here remains legal under both federal and state law. That said, the ATF's position is that even an inert printed frame qualifies as a firearm under the Gun Control Act the moment it takes shape—meaning transferring or selling one without going through proper channels is a federal problem, even in a permissive state.

Yes, but: The crime statistics aren't nothing. California logged 26 ghost guns at crime scenes in 2015. By 2021, that number was over 12,000. The ATF reports a 1,600 percent increase in homemade guns recovered from crime scenes over a six-year stretch. Critics argue that some people printing their own guns are doing so specifically to avoid background checks—not because they enjoy the hobby.

The hobbyist majority, though, looks a lot like any other gun community—people who like building things, competitive shooters who want custom setups, and gun owners in restrictive states who've run out of legal options at retail. The movement has its internal drama (the founder of Defense Distributed, Cody Wilson, is a polarizing figure even inside the community), but the technology itself doesn't care about any of that.

The big picture: David Carpenter, who founded Aves Rails, put it plainly: technology has a consistent track record of moving faster than regulators can follow. The 16 states that have criminalized homemade guns have drawn a legal line, but enforcement against someone who printed a frame in their garage and never took it outside is practically near-zero. Meanwhile, design files spread online, printers get cheaper, and the community keeps building.

What to watch: The legislative pressure point isn't the federal government right now—it's the states. Watch for additional states to push homemade gun restrictions modeled on California's framework. If that number climbs from 16 toward 25 or 30, the patchwork becomes a genuine compliance headache for anyone who travels with a home-built firearm.