Firearms Compliance
Eligibility, transfers, and NFA items · Effective June 26, 2026
Our FFL license
Horizon Arms Research holds a Federal Firearms License issued by the Bureau of Alcohol, Tobacco, Firearms and Explosives. Our FFL number is 5-84-005-07-8E-09547. You can verify any FFL's status using the ATF FFL eZ Check .
Local buyers can complete transfers directly with us. Out-of-state buyers choose a receiving FFL near them; we ship to that dealer and you complete the transfer there.
Who can buy
Every firearm purchase is completed through a licensed FFL, where you complete an ATF Form 4473 and pass a background check (NICS) before the firearm is released to you. Federal minimum ages apply and are verified at the FFL:
- Rifles and shotguns (long guns): 18 or older.
- Handguns: 21 or older.
You must also be legally eligible to possess a firearm under federal, state, and local law. Anyone prohibited from owning firearms — for the reasons listed on the Form 4473 — cannot complete a purchase. Your state or locality may set stricter requirements than the federal minimums, and those apply to you.
FFL transfers & shipping
Firearms are serialized items and are never shipped to a buyer's home. Every firearm is delivered one of these ways:
- Shipped to a licensed FFL — in Colorado or in another state — where you complete the Form 4473 and background check and take possession. You are responsible for arranging a receiving FFL and confirming they will accept the transfer (most charge a transfer fee).
- In person at HAR — local buyers can complete the transfer with us directly.
Accessories and non-serialized items (optics, lights, slings, mounts, and similar) can ship directly to you, subject to any restrictions that apply to those items in your area.
State & local restrictions
Some states, counties, and cities restrict or ban specific firearms, features, configurations, or magazine capacities (for example, California and New York, among others). These rules are your responsibility to know before you order.
We will not knowingly ship a firearm or configuration that is not legal for transfer in the destination jurisdiction. If a build you want isn't compliant where you are, we'll tell you and, where possible, discuss a configuration that is. The receiving FFL is the final check: they will not release a firearm that violates the laws where the transfer takes place.
NFA items — suppressors & short-barreled rifles
Suppressors, short-barreled rifles (SBRs), and short-barreled shotguns are regulated under the National Firearms Act (NFA). They are legal to own only in states that permit them, and they require ATF approval, a tax stamp, and registration before you can take possession. Approval times are measured in weeks to months.
- Buying an NFA item (e.g., a suppressor): transfers on an ATF Form 4 to you (or your trust) through an FFL/SOT, with the applicable tax stamp.
- Making an SBR: registered on an ATF Form 1 and approved before the rifle is built or configured as an SBR.
- Pistol vs. SBR: a firearm built as a pistol is not an SBR. Adding a stock or otherwise reconfiguring a pistol can create a regulated SBR — do not do so without the required ATF approval.
We can help you spec and source NFA-ready builds, but the ATF application, tax stamp, registration, and waiting period are the buyer's responsibility, and the item is released only after approval. NFA rules are detailed and unforgiving — verify what is legal in your state before you commit.
Your responsibility
By purchasing from Horizon Arms Research you confirm that you are legally eligible to buy and possess the firearm, that the firearm and its configuration are legal where it will be transferred and used, and that you will complete the transfer through a licensed FFL. If anything here is unclear, ask us before you order.
Questions
Not sure whether a build is legal where you are, or how a transfer works? Email sales@horizonarmsresearch.com and we'll walk you through it.