You really have only 4 options-
1.contact the second ammendmant foundation and other such groups and have them file a class action civil rights suit against colorado for the people of colorado.
2.get in touch with your local sheriff, thats where the oposition has already started. they know the laws are unconstitutional and i doubt may of them will enforce it, or support enforcement. they are your front line.
3.mass non-compliance. when hundreds of thousand of citizens stand up and say NO WE WILL NOT COMPLY. unconstitutional laws are not laws and you are under no obligation to obey them. what will they do? demand that 3/4 of the state be arrested? expecially when law enforcement will not comply?
4. the most obvious one. make sure every one of these traitorous bastards is given the opportunity to seek employment in the private sector come next election...although i really would prefer trying them in a court of law for dereliction of duty and violation of their oath as well as other official misconduct.
Best of luck! fortunately we have managed to defeat all the stupid control laws they have pushed here in Washignton state so far.