Key measures of New York’s tough new gun law are set to kick in, with owners of guns now reclassified as assault weapons required to register the firearms and new limits on the number of bullets allowed in magazines.

As the new provisions take effect Monday, New York’s affiliate of the National Rifle Association said it plans to head to court to seek an immediate halt to the magazine limit.

Gov. Andrew Cuomo calls those and other provisions in the state’s new gun law common sense while dismissing criticisms he says come from “extreme fringe conservatives” who claim the government has no right to regulate guns.