Selling a Firearm Barrel Online in Colorado? That Might Soon Be Illegal.

What This Bill Actually Does

Currently, under state and federal law, firearm barrels are generally treated as standard parts. You can buy them online, pick them up at gun shows, or trade them with a buddy in your garage. SB26-043 fundamentally changes that by requiring any standalone firearm barrel to be sold or transferred in person by a Federally Licensed Firearm Dealer (FFL).

The bill defines a firearm barrel broadly. It's not just a finished metal tube; the definition includes any forging, casting, 3D-printed part, or extrusion that can be "readily completed" or converted into a barrel. If the barrel is already permanently attached to a firearm, this bill doesn't apply. But if it's loose, you're looking at a completely new regulatory landscape.

The penalties for ignoring these new rules are strict. If you are caught selling a barrel without being an FFL, or just possessing one with the intent to sell it, you commit an unclassified misdemeanor carrying up to a $500 fine and 30 days in the county jail. A second offense bumps up to a class 2 misdemeanor. For buyers, you must be at least 18 years old and legally allowed to own a firearm. If you buy one illegally, it's considered a civil infraction.

On the dealer side, FFLs are on the hook for heavy new record-keeping. They must record the buyer's full legal name, ID number, address, date of birth, and even the exact make, model, and caliber of the gun the barrel is intended for. The dealer must keep these logs on a form prescribed by the Colorado Bureau of Investigation (CBI) for at least five years. The bill isn't a blanket ban on all transfers, though. It carves out specific exemptions for sales to law enforcement, the military, estate transfers managed by executors, government gun buyback programs, and collectors dealing in verified curios or relics. Crucially, if you are buying a barrel and a firearm in the exact same transaction and already undergoing a background check, you don't need redundant paperwork just for the barrel.

What It Means for You

If you are a hobbyist who likes to swap out barrels for different calibers, build custom rifles, or replace worn-out parts for competitive shooting, this is the one to watch. Right now, ordering a replacement barrel online and having it shipped directly to your front porch is standard practice. Under this bill, taking effect July 1, 2026, that convenience disappears. You will have to go to a local gun store, show your government-issued ID, and have the clerk process the transfer in person. This adds time, travel, and likely an FFL transfer fee—which usually ranges from $25 to $50 in Colorado—to what used to be a simple retail purchase.

You should also be aware of the new record-keeping requirements attached to your purchase. When you buy that barrel, the dealer will log your personal details, including your date of birth, phone number, and the specific firearm you plan to use it in. This information sits in the dealer's files for five years. Additionally, casual private sales between friends or neighbors are off the table. If you have a spare barrel in your safe and want to sell it to your buddy, you both have to drive down to a licensed dealer to facilitate the handoff legally.

Here is what you should do right now if this impacts you:

• Take inventory: If you have unfinished firearm projects or know you'll need replacement barrels in the near future, consider buying them before the proposed July 1, 2026, effective date when online shipping restrictions would kick in.
• Contact your Senator: This bill is currently moving on the Senate floor. Reach out to your state senator this week to express your support or opposition before the final chamber vote.

What It Means for Your Business

If you own a gun shop, a sporting goods store, or operate as an independent FFL, this bill puts new compliance mandates directly onto your sales counter. Starting July 1, 2026, you become the mandatory middleman for all standalone barrel sales in Colorado. While this could drive more foot traffic into your store and allow you to collect regular transfer fees for processing online orders, it also means serious new paperwork. Your employees will have to use a new CBI-designed form to log seven specific pieces of data for every barrel transfer, including the processing employee's own full legal name.

For Colorado-based manufacturers or machine shops that produce forgings, castings, or extrusions marketed to become firearm barrels, your direct-to-consumer online sales model is effectively dead within state lines. You will have to route all Colorado orders through an FFL, just like you would for a serialized receiver. Furthermore, the penalty for administrative non-compliance is steep. If a dealer fails to retain these records for the required five years, you face disciplinary action under C.R.S. 18-12-401.5, which specifically includes the potential revocation of your state firearms dealer permit.

Here are the steps business owners should take this week:

• Evaluate your inventory software: Start checking with your point-of-sale or compliance software vendors to see if their systems can be adapted to log barrel-specific data (like the intended firearm's make and model) alongside standard firearm logs.
• Review your e-commerce operations: If you manufacture or sell parts online, begin consulting with your legal counsel or web developer on how to restrict direct shipping to Colorado addresses, or how to integrate FFL selection tools into your checkout process for barrel purchases.
• Train your staff on definitions: Make sure your employees understand that this applies not just to finished barrels, but to "machined bodies" or "extrusion" parts that are marketed to become barrels.

Follow the Money

According to the nonpartisan Legislative Council Staff, this bill isn't going to require a massive influx of taxpayer cash. The official fiscal note projects $0 in required state appropriations for the upcoming budget years. The costs to the Colorado Bureau of Investigation to create the new tracking forms, and the workload for the courts to handle the new unclassified misdemeanors, are expected to be "minimal" and absorbable within current department budgets.

There might be a slight uptick in state revenue from criminal fines—which can reach up to $500 per violation—but analysts expect actual convictions to be relatively rare. For local governments, any extra financial burden on county jails, which would be responsible for housing anyone serving the maximum 30-day sentence, is expected to be negligible. Essentially, the financial burden of this bill falls almost entirely on consumers paying transfer fees and businesses managing compliance, rather than the state taxpayer.

Where This Bill Stands

SB26-043 was introduced in the Senate in late January 2026 by Democratic sponsors Sen. Tom Sullivan and Reps. Meg Froelich and Kyle Brown. It was assigned to the State, Veterans, & Military Affairs Committee, where it successfully passed unamended on February 12.

Right now, the bill is sitting on the Senate floor awaiting debate. It was scheduled for Second Reading on February 18, but it was laid over to February 23, 2026. This means lawmakers paused debate and voting until that date. Given the sponsorship and the current makeup of the legislature, it has a strong trajectory to pass the Senate, after which it will head to the House for committee hearings. If you want to make your voice heard on this legislation, the window right now—before the next major floor vote—is your best opportunity.