Best Colorado-Legal Firearms After SB25-003 (2026)

Buying before August 1, 2026 is the difference between a normal gun-store transaction and a multi-step permit application. SB25-003 does not ban possession of specified semiautomatic firearms you already own. A semi-auto rifle or shotgun you buy on a standard 4473 before the deadline is grandfathered: there is no eligibility card, no safety course, no registry, and no surrender obligation. The law only changes what happens at the point of a new transfer after August 1.

After the deadline, the same rifle requires a CPW Firearm Safety System profile, a five-year eligibility card from your county sheriff backed by a name-based background check and a fee, and an in-person state-certified safety course. If you are not hunter-education certified, that course is the 12-hour Extended version with a 90-percent final exam. None of that is prohibitive, but it is friction, scheduling, and cost stacked on top of the gun itself. Buyers who know they want a detachable-mag semi-auto rifle this year save themselves the entire pathway by transferring before August 1.

This urgency applies to rifles and shotguns, not to rapid-fire devices. Forced reset triggers, binary triggers, and bump stocks became felonies to possess in Colorado the day SB25-003 was signed in 2025. There is no grandfather clause and no buy-before window for them; that is covered in detail below. If you want to spec a Colorado-legal AR-15 or AK build to take to a dealer before the deadline, the rifle builder lets you configure a complete rifle against any optic, light, or trigger in the catalog.

After August 1, 2026, buying a specified semiautomatic firearm runs through four steps before a dealer can transfer the gun. First, the buyer creates a profile in the CPW Firearm Safety System. Second, the buyer applies to the county sheriff for a five-year eligibility card, which requires a name-based background check and a fee. Third, the buyer completes an in-person state-certified safety course: a 4-hour Basic course if already hunter-education certified, otherwise a 12-hour Extended course, scoring 90 percent or higher on the final exam. Fourth, the dealer confirms eligibility before the transfer. The card and the course completion must fall within five years before the purchase.

None of this deregulates anything that already applied. The federal NICS background check, the 4473, and Colorado's existing transfer rules all remain. SB25-003 adds the permit and course on top of the existing process for new purchases of covered firearms. It does not touch guns you already own, does not create a registry of grandfathered guns, and does not require anyone to surrender a rifle. The practical takeaway is unchanged: if you want a detachable-mag semi-auto rifle or shotgun, the cleanest path is a standard 4473 before the August 1 deadline.

If a manually operated gun covers your use case, the lever and bolt guns above sidestep the pathway entirely, and recoil-operated carry pistols are never covered. Colorado residents weighing a state with a feature-based ban instead of a permit regime can compare the frameworks in our Virginia after SB 749 guide and Washington after HB 1240 guide. The legal mechanics differ state to state; the buying logic of acting before a deadline does not.