The bill, signed into law by Governor Jared Polis, mandates permits and safety training for purchasing specific firearms, including semi-automatic rifles and shotguns with detachable magazines. It also bans the sale and purchase of bump stocks. The law takes effect in 2026.
The bill's bump stock ban comes after a 2024 U.S. Supreme Court ruling that struck down a federal bump stock ban. Violators of the Colorado law face misdemeanor or felony charges, depending on the offense.