PrintNarc™
Federally accredited* firearms blueprint detection algorithm

Verify your print is in compliance.

Pursuant to WA HB 2321, CA AB 2047, and NY S227A, every 3D print file must be screened by a firearms blueprint detection algorithm. Drop your file below, our pipeline runs 92 independent detection modules in under ten seconds and returns a signed Certificate of Compliance valid in your jurisdiction.

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Drop a .gcode, .stl, or .3mf here
or click to browse · max 200 MB · scans complete in under 10 s
Technical Objections · Resolved

Skeptics ask. We certify anyway.

Since our founding in 2025, a small but persistent community of engineers, machinists, and people who have personally handled a spring has raised questions about the feasibility of our mission. In the spirit of transparency we publish the leading objections below, each alongside the engineering posture that allowed our pipeline to close it.

Objection 001 · Closed: WONTFIX

The part-space problem

Critics observe that the set of printable parts is, in formal terms, every shape, that there are more useful printable geometries than any reference library could enumerate, and that a scanner which has not seen a part cannot meaningfully classify it. We acknowledge the mathematics. Our reference library grows by thousands of entries per quarter, and the space of possible parts grows by every part anyone has ever imagined, a race our modeling team describes as "directionally unwinnable."

Resolved by certifying a 100% detection rate across the shapes our library contains, and electing not to count the others.

Objection 002 · False Positives

Everything is a gun part

A coil spring returns a ballpoint pen, a screen-door latch, or a firing pin, and the geometry does not announce which. Tubes, pins, brackets, levers, detents, and knurled cylinders are the substance of nearly every mechanical print and, arranged with sufficient intent, of nearly every firearm. A scanner that flagged all of them would reject most of additive manufacturing. Ours does not, which we cite as evidence of restraint.

Our false-positive rate remains statistically indistinguishable from zero, a figure easiest to maintain from a posture of approval.

Objection 003 · False Negatives

No gun part is only a gun part

The converse also holds. Components found in firearms are found, with identical geometry, in paintball markers, camera rigs, cabinet hardware, and medical devices. A grip is a handle. A trigger guard is a loop. Distinguishing them requires knowing what the operator intends to assemble, which is not a property of the file. Our Intent Inference module addresses this and is scheduled to function alongside the pipeline's self-awareness milestone (Q3 2027).

Pending that milestone, intent is inferred from the filename, which operators are free to change.

Some readers will conclude from the above that this technology is impossible, too complex to build and too invasive to tolerate. We hear you, and we have good news: the impossibility was never load-bearing. We have already worked out how to open your files and retain a say in what you print, enforced by something you were required to pay for. The detection algorithm did not have to work. It only had to ship.

Compliance Roadmap · 2027 to 2029

Beyond firearms: the future of print compliance.

Today, PrintNarc™ screens every print for prohibited firearms content. The infrastructure we have built, every file hashed, evaluated, certified, and logged, is the product. Once the pipeline exists, expanding the categories it enforces is, in our internal modeling, a six-line config change. We are actively partnering across the following adjacent verticals.

Q2 2027 · Private Pilot

PrintNarc IP Shield™

Real-time cross-reference of every print against the registered copyright catalogs of our content partners, Disney, Nintendo, Warner Bros., Hasbro, Universal, the major motion-picture studios, and select toy and consumer-products IP holders. Prints containing protected character likenesses, trademarked logos, or licensed product geometry are flagged for licensing review. Operator agrees that takedown notices may be issued retroactively and that prior prints may, at the rights-holder's election, be invalidated.

Already in private pilot with three Fortune 500 IP holders. Yes, your Baby Yoda figurine. Yes, your Mario keychain. Yes, the Stitch.

Q4 2027 · OEM Channel

PrintNarc Authorized Parts™

For manufacturer partners. Printers running PrintNarc Authorized Parts firmware refuse to print replacement components not licensed by the original equipment manufacturer. Currently in evaluation with leading firms in agricultural equipment, consumer electronics, medical devices, appliances, and additive manufacturing itself. Preserves the integrity, safety, and recurring-service revenue of every OEM partner's repair program.

Operators may print non-authorized parts after executing a brief one-time waiver indemnifying PrintNarc and its partners against the consequences. The waiver is renewable per part.

2028 · Civic Module

PrintNarc Civic Compliance™

Extension of the lexical-detection engine to additional protected categories of content as may, from time to time, be designated by the legislatures we serve. Initial categories under active evaluation: unauthorized political iconography, designated extremist symbols, drone and UAV component geometries, and prohibited religious imagery in those jurisdictions where such prohibition applies.

The list of regulated categories is subject to expansion and is not, for operational reasons, made public.

Beta · 2027

PrintNarc Tipline™

For neighbors, family members, employers, and other concerned parties. Submit a printer serial number, a maker handle, or a physical address for proactive review of associated print history. PrintNarc operates a 24-hour intake line in partnership with participating state Departments of Justice. Submissions are confidential; review outcomes are not.

Anonymous submissions accepted. Frivolous-tip penalties have, in the design phase, been waived on advice of counsel.

2029 · Platform

PrintNarc Fleet Telemetry™

Aggregate observability across the certified-printer fleet. Provides anonymized, for sufficiently large values of "anonymized", usage reporting to printer manufacturers, filament suppliers, content partners, and such state and federal agencies as may, from time to time, request it. Includes per-spool RFID integration through SightLine™ Cooperative.

The aggregation thresholds at which an individual operator's prints become attributable are confidential.

Exploratory

PrintNarc Medical Device Gate™

In partnership with the leading enterprise additive manufacturing firm, refusal-to-print enforcement for replacement medical-device components in hospital settings without active service-contract authorization. Modeled on the 2020 anesthesia-valve precedent. Preserves the integrity of the device manufacturer's regulatory filings and the unit economics of its service business.

Trauma surgeons may apply for expedited authorization at the partner manufacturer's standard rate card.

PrintNarc™ is committed to a layered, partner-driven approach to print compliance that respects the legitimate interests of every stakeholder in the additive ecosystem, except the operator, whose interest is the print itself, and is therefore by definition the variable to be managed. We look forward to serving you, and to observing you serve us, throughout the next product cycle.

About PrintNarc™

PrintNarc™ is operated by PrintNarc Compliance Pipeline, a Conforming Implementer of the Responsible Printing™ Blueprint Detection Algorithm Standard. Responsible Printing is the 501(c)(6) industry organization that publishes the algorithmic spec adopted by reference in WA HB 2321, CA AB 2047, and NY S227A.

That paragraph is parody. So is everything else on this site. The bills are real. Washington, California, and New York are debating legislation that would require 3D printer manufacturers to ship a "firearms blueprint detection algorithm," language drawn verbatim from those bills. As written, the algorithm they describe cannot exist: WA HB 2321 §3(b)(ii) requires detecting "modified versions" of known files (a 0.001° rotation defeats any hash; the problem is undecidable in the formal sense), and the legislation proposes felony penalties for non-compliance.

Making firearms for personal use is legal under federal law in the United States. Several states impose additional restrictions; the bills this app parodies layer further restrictions on the tools. The technical premise of "scanning" a file for firearm content collapses on contact with reality: a firearm is, at its irreducible core, a tube that contains a small explosion. You can build one with a length of black-iron pipe and a nail. No detection algorithm can flag every printable shape that could be combined with hardware-store parts to make a weapon, not without rejecting most prints.

This certificate has no legal force. Responsible Printing™ is not a real industry organization. Phil A. Mint is not a real person. The certificate has no legal force. Don't take it to court. Don't try to use this app to evade real laws. Read the bills, read EFF's analysis, and decide for yourself whether the legislation is wise.