CHICAGO – A group of Chicago-area gun shops and gun owners are suing in an attempt to stop a new $25 tax on gun purchases in Cook County.

Plaintiffs in the lawsuit filed Thursday in Cook County Circuit Court claim the new tax violates the right to bear arms. The tax goes into effect April 1 and is projected to bring in $600,000 this year.

"There's enough taxes on those already – we pay a sales tax. [And] I had to pay $100 to qualify to purchase a gun – and I think I've paid enough," Chicago resident and plaintiff Deborah Gowder told the Chicago Sun-Times.