Liberal hippies who happen to be gun owners are leading the resistance against a new gun ban in Boulder, Colorado.

The city banned the possession and sale of numerous semi-automatic firearms back in June and is now demanding residents who owned such weapons prior to the ordinance to "certify" their guns with the police department.

However, many of Boulder's gun owners are Democrats who are refusing to comply.

"I would say the majority of people I've talked to just aren't complying because most people see this as a registry," Lesley Hollywood, a Colorado gun rights activist, told the Washington Times. "Boulder actually has a very strong firearms community."