I've had this conversation at least fifty times. A gunsmith corners me at a show, or calls after an inspection went sideways, and asks the same question: "Am I a manufacturer now?" Most of the time they already know the answer in their gut. They just want someone to tell them it's fine.
It usually isn't fine. The line between a Type 01 dealer-gunsmith and a Type 07 manufacturer is one of the most expensive lines to misread in this industry, and ATF has been steadily clarifying it in ways that catch a lot of shops off guard.
What the two licenses actually authorize
A Type 01 Federal Firearms License lets you deal in firearms and perform gunsmithing—meaning repair, adjustment, and customization of an existing customer-owned firearm. You can take in a rifle, fix it, give it back. You can sell guns out of your inventory. You can do a lot under an 01.
What you cannot do under an 01 is manufacture firearms for sale or distribution. That requires a Type 07. The statutory hook is 18 U.S.C. § 923(a) and the definitions sit in 18 U.S.C. § 921(a)(10) (manufacturer) and § 921(a)(11) (dealer, which expressly includes "gunsmith"). The implementing regulations are at 27 CFR § 478.41 and following.
Here's the practical difference. Under an 01, you are working on someone else's gun. Under an 07, you are producing a firearm for sale—even if "producing" looks an awful lot like the kind of bench work a gunsmith does every day. The distinction sounds simple. It is not.
ATF Ruling 2009–5: the document everyone should read
If you take one thing from this post, take this: ATF Ruling 2009–5 is the operational map. It is the closest thing to a clean answer ATF has given us, and most of the gray-area questions in a gunsmithing shop run through it.
The ruling distinguishes between work performed on a customer-owned firearm (gunsmithing) and work that produces a firearm for sale (manufacturing). Key principles from the ruling and from how IOIs apply it in the field:
- Repair, restoration, and customization of a customer-owned firearm returned to that same customer is gunsmithing.
- Assembling firearms from parts for sale—including building complete firearms on receivers you bought or that customers transferred to your inventory for that purpose—is manufacturing.
- Making firearm components for sale (barrels, frames, receivers, complete uppers attached to lowers you're selling) is manufacturing.
- Doing the same operation as a routine, repeat production process, even one piece at a time, leans toward manufacturing.
The ruling does not give you a magic threshold of "X builds per year." Anyone who tells you "you can build ten a year without a 07" is making that up. ATF looks at intent, business pattern, and whether the firearm is being produced for sale.
Walking through the work that actually comes through the door
Let me get specific, because that's where the questions live.
Barrel threading on a customer's barrel
Customer brings in a rifle, you thread the muzzle, customer takes it home. That's gunsmithing. You're modifying a customer-owned firearm and returning it. Type 01 is fine. Keep a service record.
Customer brings in a bare barrel, you thread it, customer takes it home. Still gunsmithing if you're just performing a service on their part.
You buy barrels in bulk, thread them, and sell them. Now you're manufacturing firearm components for sale. That's a 07 conversation, and depending on volume it may also pull in excise tax under 26 U.S.C. § 4181—verify with a firearms-savvy CPA.
Slide milling for optics
Customer ships you a slide, you cut it for an RMR, you ship it back. Gunsmithing. The slide is not a firearm; the frame is. You modified a customer-owned part and returned it to the same customer.
You buy slides, mill them for optics cuts, and resell them. That looks like a component manufacturing operation, even though slides aren't the serialized part. ATF's interest sharpens when you're producing things for sale as a repeat business process.
Refinishing and Cerakote
Refinishing a customer's firearm and returning it to them is gunsmithing. Pure and simple. Cerakote, bluing, parkerizing, color case—all the same answer when the gun belongs to the customer.
Taking in stripped frames, refinishing them, and selling them as a product line is a different posture. You're not just providing a service; you're producing inventory.
Building on a customer's lower
This is the one I get asked about constantly. Customer transfers their stripped lower to you (or brings it in already owned), and asks you to build a complete rifle on it using parts they pick out. You source the parts through your dealer accounts, assemble, function check, and transfer the completed rifle back to the customer.
The key question ATF asks: who owns the receiver during the build, and is the completed firearm being produced for sale, or is it a service performed on the customer's firearm?
If the customer truly owns the lower throughout—they bought it, it's logged into your A&D book as a customer-owned firearm in for service, and the assembly is a service you're billing for—that posture leans toward gunsmithing under Ruling 2009–5. If you're sourcing the lower, building it up, and then "selling" the completed rifle to the customer, you are manufacturing. The receiver acquisition path matters.
Document it. Service ticket, parts list, time logged, customer's prior ownership of the receiver if applicable. If you can't show ATF a clean chain, they will assume the worst.
Complete custom builds
If a customer says "build me a 1911 from scratch, your choice of parts, send me the bill," and you're acquiring the frame, fitting everything, and delivering a finished firearm—that's manufacturing. Doesn't matter that there was a customer order on the front end. You produced a firearm for sale.
Uppers on a customer lower (AR pattern)
The upper is not a firearm. Building uppers and selling them is a parts business, not firearms manufacturing in the § 921 sense. But two cautions: if you're building complete rifles by mating uppers to lowers you own and then selling the assembled rifle, that's manufacturing. And the ATF Final Rule 2021R-05F (Frame or Receiver, 2022) expanded what counts as a frame or receiver in some platforms—verify the current ATF guidance for any platform where the receiver definition is contested.
Where the line has shifted
Two recent regulatory developments are worth flagging because they touch this question.
ATF Final Rule 2022R-17F, the "Engaged in the Business" rule from 2024, didn't change the gunsmith-vs-manufacturer line directly, but it sharpened ATF's framework for evaluating whether activity is a business at all. If you're doing manufacturing-flavored work "as a hobby" or "on the side," the rule makes the predominant-intent analysis more aggressive. The same logic carries over: routine, repeat production work for compensation looks like a business, and a business producing firearms looks like manufacturing.
Garland v. VanDerStok (2025) upheld ATF's authority over unfinished frames and weapon parts kits under the 2022 Frame or Receiver rule. If your shop does work on 80%-style receivers—finishing them, jigging them, selling completed receivers—you are squarely in manufacturing territory and you need to know it.
We cover both of these in Recent Regulatory Developments.
What changes when you cross the line
Operating as a manufacturer is not just a different license fee. It pulls in real obligations.
Marking. Under 27 CFR § 478.92, a manufacturer must mark each firearm with the manufacturer's name, city and state, model, caliber, and a unique serial number, in the depth and font ATF specifies. If you're building complete firearms for sale, every one of them needs your markings—not the receiver maker's, yours, applied per the regulation. This is one of the most common findings in 07 inspections.
Bound book entries. Manufactured firearms get entered into your acquisition and disposition records as acquisitions when completed, with you as the manufacturer of record. The entry format is in 27 CFR § 478.123. This is different from how a dealer logs an incoming repair.
Federal Excise Tax. Manufacturers of firearms are generally liable for the 10% or 11% FAET under 26 U.S.C. § 4181, administered by the TTB. There are small-manufacturer exemptions and exceptions for certain custom work, but assume you owe it until a CPA tells you otherwise.
ITAR registration. Most firearms manufacturers must register with the State Department under ITAR, even if they never export. That's a separate annual fee and obligation.
Inspection scope. A 07 inspection looks at more than a dealer inspection. IOIs will sample your marked product, verify your serialization scheme, walk your production area, and check your tax records. ATF Inspection Defense covers what to expect.
The practical test I use
When a gunsmith asks me whether they need to upgrade, I ask four questions:
- Are you producing complete firearms—not repairing, not modifying customer firearms, but producing—and selling them?
- Are you producing firearm components (frames, receivers, complete fire-control assemblies) for sale as a repeat business activity?
- Are you finishing 80%-style receivers for customers or for inventory?
- Are you acquiring receivers, building them up, and transferring the completed firearm as a sale rather than as a service on a customer's existing firearm?
If you answer yes to any one of those with any regularity, you need a Type 07. Not "should consider." Need.
What to do now
If you read this and your stomach sank a little, here's the order of operations.
- Inventory your work. Pull six months of service tickets and invoices. Categorize each job as repair, modification of customer firearm, or production-for-sale. Be honest.
- Look at the production-for-sale pile. If it's more than incidental—more than a handful of one-off favors—start the Type 07 application now. The license fee is modest. The cost of operating without it is not.
- Fix your records before ATF fixes them for you. Bound Book Management walks through the entry differences between dealer and manufacturer postures.
- Train the staff. If your counter people are taking in work without flagging which jobs require a manufacturer license, you have a process problem, not a knowledge problem. The Gunsmith Certified bundle is built for exactly this gap, and the documentation it produces is what an IOI wants to see.
- Get advice on the tax side. FAET, ITAR, and state-level manufacturing obligations are separate problems. A firearms-savvy CPA pays for themselves the first year.
I'm not your lawyer, and none of this is legal advice for your specific situation—consult qualified counsel and verify current ATF guidance before you make a licensing decision. But the framework above is how the industry actually operates, and it's how IOIs actually evaluate the work. The shops that get in trouble are the ones who told themselves the line was somewhere it wasn't. Don't be that shop.