Yes — if you repair, modify, or build firearms for paying customers as a regular trade, you need a gunsmith license from the federal government, specifically a Federal Firearms License (FFL) issued by the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF). Working on your own guns, or helping a friend now and then, does not require one. Charging money on a regular basis does, and doing that work without a license is a federal felony carrying up to five years in prison.1Office of the Law Revision Counsel. 18 USC 924 – Penalties
When Federal Law Requires a License
The Gun Control Act of 1968 requires anyone “engaged in the business” of gunsmithing to hold an FFL. Federal law defines a gunsmith-type dealer as someone who repairs firearms or fits barrels, stocks, or trigger mechanisms to firearms for customers.2Bureau of Alcohol, Tobacco, Firearms and Explosives. Federal Firearms Licenses To be “engaged in the business” means devoting time, attention, and labor to gunsmithing as a regular course of trade with the principal objective of earning a livelihood and profit.3Office of the Law Revision Counsel. 18 U.S. Code 921 – Definitions
The statute carves out a clear exception for non-commercial work. A person who makes occasional repairs to firearms, or occasionally fits special barrels, stocks, or trigger mechanisms, is not engaged in the business and does not need an FFL.3Office of the Law Revision Counsel. 18 U.S. Code 921 – Definitions The dividing line is intent and regularity, not skill. A highly skilled hobbyist who never charges anyone stays outside the licensing requirement. An amateur who advertises services and starts taking money for trigger jobs does not. Once you hold yourself out as available for hire and make gunsmithing a routine activity aimed at earning income, you have crossed into licensed territory.
Willfully operating as a gunsmith without the proper FFL is punishable by up to five years in federal prison, a fine, or both.1Office of the Law Revision Counsel. 18 USC 924 – Penalties
Which FFL Type Fits Your Work
Not every gunsmithing business needs the same license, and picking the wrong one creates compliance problems.
Type 01: Dealer, Including Gunsmiths
Most gunsmiths need a Type 01 FFL, officially titled “Dealer in Firearms Other Than Destructive Devices.” This license covers selling firearms at wholesale or retail and repairing or customizing firearms for customers. The application fee is $200, and renewal every three years costs $90.2Bureau of Alcohol, Tobacco, Firearms and Explosives. Federal Firearms Licenses If your business stays within repair work, trigger replacements, refinishing, stock fitting, and similar services on customer-owned firearms, a Type 01 is the correct license.
Type 07: Manufacturer
If your work goes beyond fixing existing firearms into building complete guns for sale, the ATF classifies that as manufacturing. Assembling firearms from parts kits for resale, machining custom receivers, or producing complete rifles from scratch all require a Type 07 FFL (“Manufacturer of Firearms Other Than Destructive Devices”). The application and three-year renewal fees are $150.2Bureau of Alcohol, Tobacco, Firearms and Explosives. Federal Firearms Licenses
Manufacturers also owe a federal excise tax on every firearm they produce, at 10 percent of the sale price for pistols and revolvers and 11 percent for other firearms.4Office of the Law Revision Counsel. 26 USC 4181 – Imposition of Tax That tax is why the ATF draws a hard line between repair and manufacturing. A gunsmith who drifts into building complete firearms under a Type 01 is both unlicensed as a manufacturer and evading excise taxes.
Suppressors and Other NFA Items
Customers will eventually bring in suppressors, short-barreled rifles, or other items regulated under the National Firearms Act. A standard Type 01 gunsmith can receive an NFA item for repair, but the work itself is tightly restricted. A repair that increases the overall length, changes the diameter, or alters the caliber of a suppressor is considered making a new NFA firearm rather than repairing the existing one, and that new item would need its own registration and tax payment.
Gunsmiths who want to routinely work on, deal in, or manufacture NFA items pay an annual Special Occupational Tax (SOT) on top of their FFL. A Type 01 with a Class 3 SOT can deal in NFA items; a Type 07 with a Class 2 SOT can manufacture them. The annual SOT is $500 for most small businesses. Without SOT status, be cautious about what NFA work you accept, because a well-intentioned repair that crosses into “making” a new NFA firearm without proper registration is a serious federal offense.
Applying for the License
The application is ATF Form 7 (or 7CR for certain license types). Current processing time for a paper application is roughly 60 days.5Bureau of Alcohol, Tobacco, Firearms and Explosives. Current Processing Times The form covers you, any business partners, and the premises where you plan to operate.
Who Qualifies
Applicants must be at least 21. Federal law bars anyone convicted of a crime punishable by more than one year in prison, anyone dishonorably discharged from the military, anyone adjudicated as mentally defective or committed to a mental institution, unlawful users of controlled substances, fugitives from justice, and anyone convicted of a misdemeanor crime of domestic violence.6Office of the Law Revision Counsel. 18 USC 922 – Unlawful Acts These are the same categories that prohibit firearm possession generally.
Responsible Persons
Every individual with authority to direct the management and policies of the business must be listed as a “responsible person.” For a sole proprietor, that is just you. For a corporation or LLC, it includes officers, partners, and board members with decision-making power. Each responsible person completes their own section of the application, submits a 2-by-2-inch photograph, and includes a fingerprint card (Form FD-258).7Bureau of Alcohol, Tobacco, Firearms and Explosives. Form 7/7CR Instructions – Application for Federal Firearms License
The Interview and Inspection
Once the background checks clear, an ATF Industry Operations Inspector schedules an in-person visit. The inspector reviews your business location, confirms it complies with state and local laws, and interviews you about your planned operations, then prepares a report recommending approval or denial. Common reasons for denial include failure to comply with local zoning, prior willful violations of the Gun Control Act, or false statements on the application.8Bureau of Alcohol, Tobacco, Firearms and Explosives. Apply for a License
Staying Compliant Once Licensed
Getting the license is the easy part. Federal record-keeping is where most gunsmiths run into trouble.
The Acquisition and Disposition Book
Every licensed gunsmith maintains a bound book (an A&D book) recording every firearm received and every firearm returned or transferred. When a customer drops off a gun, you log the date received, the customer’s name and address, and the firearm’s manufacturer, model, serial number, type, and caliber. When you return it, you log the disposition. Acquisitions must be recorded by the close of the next business day, and dispositions within seven days.9eCFR. 27 CFR 478.125 – Record of Receipt and Disposition
One narrow exception: if a firearm comes in for adjustment or repair and goes back to the same person the same day, no bound book entry is needed.9eCFR. 27 CFR 478.125 – Record of Receipt and Disposition Anything that stays overnight gets logged.
Do You Need a Form 4473 to Return a Repaired Gun
No, as long as you are returning the firearm to the person who brought it in. Federal regulations specifically exempt from the Form 4473 requirement any firearm delivered to a licensee solely for repair or customizing when it is returned to the original owner.10Bureau of Alcohol, Tobacco, Firearms and Explosives. Firearms Questions and Answers If the firearm changes hands to someone other than the original owner, a 4473 and background check are required.
Compliance Inspections
The ATF conducts periodic compliance inspections. An Industry Operations Inspector reviews your bound book, checks whether your physical inventory matches your records, and examines your operations. Minor, non-recurring paperwork mistakes are usually corrected on the spot. Willful violations are a different story: the ATF will move to revoke an FFL for transferring a firearm to a prohibited person, failing to conduct required background checks, falsifying records, or failing to account for firearms in inventory, and courts have held that a single willful violation is sufficient grounds for revocation.11Bureau of Alcohol, Tobacco, Firearms and Explosives. Revocation of Firearms Licenses
State and Local Rules You Still Have to Clear
A federal license does not exempt you from state and local requirements. The ATF verifies compliance with those rules before approving your application.8Bureau of Alcohol, Tobacco, Firearms and Explosives. Apply for a License Many states require a separate firearms dealer license or permit that operates independently of the federal system, with fees and requirements that vary widely.
Zoning is where prospective gunsmiths hit the most friction, especially anyone planning to work from home. Local governments commonly restrict or prohibit firearms businesses in residential zones, and some ban them near schools, churches, or other sensitive locations. Even if your state allows home-based FFLs, your city or county may not. Check with your local planning department before you invest in the federal application, because a zoning denial will kill the FFL application downstream.
Beyond firearms-specific permits, you will need the same infrastructure as any other small business: a registered business name, a legal entity such as an LLC or sole proprietorship, a local business license, and compliance with your state’s sales tax rules. Skipping any of these gives the ATF a reason to deny or delay your license.