Senate approves bill restricting certain semiautomatic firearms and adding training and exemption rules

Senate Bill 3, concerning prohibited activity involving specified semiautomatic firearms, passed the Colorado Senate on Feb. 18, 2025, by a roll-call vote of 19 ayes and 15 no, following lengthy floor debate and several amendments.

The bill, as described on the Senate floor, prohibits certain activity involving semiautomatic firearms and classifies devices that increase the rate of fire as dangerous weapons. Sponsors said the measure targets public-safety risks while exempting many commonly used hunting rifles; opponents said the bill would treat the constitutional right to keep and bear arms as a government-granted privilege rather than a right.

Sponsor remarks and technical amendments Sponsor Senator Gonzales asked permission to offer a technical third-reading amendment (L042) to clarify language such as replacing some terminology and to correct drafting errors; the body granted permission and later adopted the amendment. Senator Gonzales urged colleagues to support the bill and pointed out that the bill's exemptions cover common hunting rifles to avoid unintentionally singling out hunting tools.

Opposition: rights, registry and veteran exemptions Opponents framed the bill as an intrusion into Second Amendment protections. The floor record includes extended speeches contending that the bill would create training requirements, a form of registry, and a permissions regime that could be used to deny the exercise of a constitutional right. Several senators said the proposal requires citizens to take courses or register to exercise firearm ownership in ways that differ from traditional conceptions of the right to keep and bear arms.

Quotes and key positions - "If the second amendment were treated like a hunting license ... we would face arbitrary restrictions," the minority leader said during a floor speech opposing the bill, arguing the measure treats rights as privileges. (Transcript: extensive remarks opposing SB3.) - Sponsor Senator Gonzales emphasized exemptions for hunting rifles and urged an aye vote, saying the bill had been shaped with hunting stakeholders in mind.

Vote and aftermath - Motion: Adoption of committee and amendments and final passage on third reading. - Vote: Senate Bill 3 passed on final passage with a tally of 19 ayes, 15 no, 0 absent, 0 excused, and 1 vacant; outcome: passed. - After passage, two senators requested removal as cosponsors in the record (Senator Snyder and Senator Exum), as read on the floor.

Clarifying details discussed on the floor - Sponsor and proponents said the bill exempts many common hunting rifles and included an amended list of specified models; floor debate noted this was intended to address hunting-community concerns. - Opponents emphasized earlier amendments (offered in committee and on the floor) and argued that the bill's classification lists and annual updates could create inconsistent exemptions.

Why this matters Senate Bill 3 drew sustained debate because it touches on constitutional rights, public-safety arguments, exemptions for hunters and veterans, and questions about whether and how the state should require training or registration for certain firearm purchases. The law will shape Colorado's regulatory approach to semiautomatic firearms and specifies which variants are prohibited or exempted—and how those lists are maintained.

Speakers quoted in this report are identified in the official Senate transcript.