Colorado’s firearm laws changed significantly with the passage of Senate Bill 25-003, one of the most debated gun bills in recent state history. Signed into law by Governor Jared Polis in April 2025, the law creates new restrictions and training requirements for purchasing many semiautomatic firearms in Colorado beginning August 1, 2026.

For Colorado gun owners, instructors, hunters, concealed carry holders, and first-time buyers, SB25-003 changes the process of legally purchasing certain firearms and adds a new layer of state oversight.

What Firearms Are Affected?

The bill targets what Colorado calls “specified semiautomatic firearms.” Under the law, this generally includes:

• Semiautomatic rifles with detachable magazines
• Semiautomatic shotguns with detachable magazines
• Gas-operated semiautomatic handguns with detachable magazines

This category includes many commonly owned firearms such as AR-platform rifles and other detachable-magazine semiautomatic firearms.

The law does not ban possession of firearms people already own. Current owners may continue possessing their firearms legally.

What Changes on August 1, 2026?

Starting August 1, 2026, Colorado residents who want to purchase one of these firearms must complete additional requirements before the sale can legally happen.

Depending on the firearm and the buyer’s background, this may include:

• Completing a state-approved firearms safety course
• Completing hunter education
• Passing a background check
• Applying for a firearms safety eligibility card through the sheriff’s office
• Paying state-required fees
• Completing live-fire training and legal instruction

The courses outlined in the law include instruction on:

• Safe firearm handling
• Colorado and federal firearm laws
• De-escalation
• Suicide prevention awareness
• Secure storage
• Live-fire exercises

Is This an “Assault Weapons Ban”?

That depends on who you ask.

Supporters of the bill describe it as a public safety law focused on training and accountability before purchasing certain semiautomatic firearms.

Opponents argue that the law functions as a de facto assault weapons ban because it creates costly and time-consuming barriers to purchasing some of the most common firearms in America.

The original version of the bill was reportedly much stricter and would have outright banned many semiautomatic firearms with detachable magazines. Amendments softened the bill by allowing purchases after completing training and eligibility requirements.

What About Concealed Carry Permit Holders?

One major point of confusion is that having a Colorado CHP/CCW permit does not automatically exempt someone from SB25-003 requirements.

Even experienced gun owners and concealed carry permit holders may still need to complete the new state-approved process when purchasing affected firearms after August 1, 2026. The exact implementation details are still being finalized through Colorado Parks and Wildlife and state agencies.

Rapid-Fire Devices Are Also Banned

SB25-003 also bans “rapid-fire devices” such as bump stocks and other accessories designed to increase a firearm’s rate of fire. Colorado now classifies these devices as dangerous weapons under state law.

What This Means for Firearms Instructors

For firearms instructors across Colorado, the law is likely to increase demand for:

• Certified safety courses
• Legal-use-of-force education
• Beginner firearms instruction
• Live-fire qualification training

The state is still building out portions of the training and certification process, and instructors may eventually need to meet additional requirements to teach approved courses connected to the law.

What Colorado Residents Should Do Now

Colorado residents should start paying attention now rather than waiting until 2026.

Here are the biggest practical takeaways:

• Current firearm ownership is not outlawed under SB25-003
• Future purchases of many semiautomatic firearms will become more regulated
• Training and documentation will become increasingly important
• Firearms owners should stay updated as agencies finalize implementation rules
• Buyers should expect longer purchase processes and additional costs after August 2026

For many Colorado gun owners, this bill represents one of the largest firearm policy shifts the state has seen in years. Whether viewed as a safety measure or a restriction on Second Amendment rights, SB25-003 will directly impact how Coloradans purchase certain firearms moving forward.