Colorado Democrats rejected Republican efforts to repeal new background-check requirements for private gun sales and to eliminate limits on the size of ammunition magazines.
The votes came Monday as GOP lawmakers got their last chance during this year's legislative session to change Colorado's firearm laws.
A Democrat-led House committee voted 7-4 against a bill to repeal a 2013 law that requires background checks for private gun sales conducted online and in person.
The same committee also voted 6-5 to reject a measure to strike a law that limits ammunition magazines to 15 rounds.
The bills cleared the GOP-controlled Senate earlier. Republicans argue the laws infringe on the Second Amendment.
Democrats passed the laws in response to mass shootings at a suburban Denver movie theater and Connecticut's Sandy Hook Elementary School.