A customer drops off a rifle. You thread the barrel, fit a new stock, and tune the trigger. That is repair. You hand it back, log the work, and move on. Nobody calls that manufacturing.
Now change the facts. You take in a receiver, build it out, and the gun that leaves your bench is meaningfully different from the one that came in. Or you produce firearms on spec and put them on the rack for sale. Somewhere between those two scenarios you crossed a line, and the line carries a marking obligation, a recordkeeping obligation, and a tax exposure that most gunsmiths never see coming.
The problem is that the line is not bright, and the consequence of guessing wrong shows up in an inspection or an excise-tax bill, not at the moment you made the call.
Repair keeps the gun the same. Manufacture creates a new one.
The working distinction is whether you are restoring a customer's existing firearm to its intended function or producing a firearm for sale or distribution. Repair on a gun a customer owns, returned to that same customer, is the bench work you do every day. It does not make you a manufacturer, and it does not trigger the manufacturer marking standard.
Manufacturing is production. When you make firearms for distribution, you are operating as a Type 07, and the rules that attach to that activity attach to your work.
Where gunsmiths get caught is the gray middle:
- Building a firearm from a receiver and parts, then selling it.
- Taking in raw or unmarked receivers and turning out completed guns.
- NFA conversions, where you make a short-barreled rifle, a short-barreled shotgun, or another NFA item out of something that was not one before.
- Volume work that starts to look less like servicing customers and more like a production line.
None of those is exotic. They are the natural drift of a busy shop that says yes to more interesting jobs. The drift is the risk.
The marking trigger
Here is the part that catches people. When your work makes you the manufacturer of a firearm, you have to mark it to the federal standard. Under 27 CFR § 478.92, the markings have to meet a minimum height of 1/16 inch and a minimum depth of .003 inch, and they have to include the required identifying information. That is not the same as engraving a customer's name on a sideplate. It is a regulatory marking with a defined size, depth, and content.
A gunsmith who builds and sells without marking to that standard has produced an unmarked, non-compliant firearm. That is a finding waiting to happen, and it is entirely avoidable if you knew where the line was before you took the job.
The NFA layer makes it sharper. If your bench work creates an NFA item, you are making an NFA firearm, and the making process, the registration, and the marking all apply. The tax math changed: effective January 1, 2026, the One Big Beautiful Bill Act reduced the NFA making and transfer tax to $0 for items such as suppressors, short-barreled rifles, short-barreled shotguns, and AOWs. The registration, the forms, and the background check did not go away. A $0 tax is not a free pass on the paperwork or the marking.
The tax most new manufacturers miss
The second surprise is the Firearms and Ammunition Excise Tax under 26 U.S.C. § 4181. If your activity is manufacturing, FAET generally applies at 10% on pistols and revolvers and 11% on other firearms and ammunition. A gunsmith who has been quietly building and selling, thinking of it as fancy repair work, can be sitting on an excise-tax liability they never accounted for. And if you are operating as a Type 07, the annual manufacturing report, AFMER (ATF Form 5300.11), is due every year, including years with zero production.
None of this is a reason to stop doing interesting work. It is a reason to know which side of the line a given job puts you on before you quote it.
Why this is a training problem, not a judgment problem
The gunsmith who drifts from repair into manufacturing is rarely careless. They are good at the bench and not steeped in the regulatory definitions, because nothing about turning a wrench teaches you the marking standard or the FAET threshold. "We talked about staying on the repair side" is not a defense when an inspector finds an unmarked gun you built and sold, or when a tax question lands.
That is the gap DealerReady is built to close. The Gunsmithing vs. Manufacturing course walks the line between repair on a customer's firearm and production for distribution, the NFA conversion question, and the marking question that decides whether you complied. If your shop runs Type 07 work, the Manufacturing Rules (Type 07 FFL) course covers the marking standard, AFMER, and the excise tax in the same place. For a gunsmith who does both repair and build work, the Gunsmith Certified credential stacks the relevant courses into one dated, verifiable record.
That record matters twice. It documents that your bench staff was trained on where the line sits, and it is the kind of third-party training documentation your carrier can audit and credit at renewal. Documented beats discussed, especially when the work is specialized and the failure mode is specific.
This is training and a paper trail, not legal advice. Confirm the specifics of any job against the current ATF forms, instructions, and rulings, and bring in counsel where the stakes warrant it.
If your bench work has been creeping toward production, the time to know which side of the line you are on is before the next build, not during the next inspection. Browse the course catalog to see where to start.