Here is a summary from Courthouse News, 3/2/15 of Judge Mueller's 28-page ruling denying plaintiff's Second Amendment challenge in this lawsuit to a California law banning new or modified semiautomatic handguns unless they use microstamping that allow bullets to be traced after firing:
California's Unsafe Handguns Act, which bans new semiautomatic handguns that do not stamp identifying information on the cartridge when a bullet is fired, is constitutional, a federal judge ruled.
The Unsafe Handguns Act prohibits the manufacture or sale of any gun that does not meet certain safety requirements. The California Department of Justice keeps a roster of tested revolvers or semiautomatic pistols that have been deemed not to be unsafe.
The purpose of the law is to reduce crime by reducing the sale of cheap handguns, ensuring that handguns fire when they are supposed to and do not fire when dropped.
A 2007 amendment prohibited the manufacture or sale of handguns without microstamping technology, which identifies the gun's make, model and serial number through a code on a bullet's casing. The microstamping requirement took effect in 2013.
The Unsafe Handguns Act does not violate the constitutional right to bear arms because gun owners do not have a right to buy specific types of firearms, U.S. District Judge Kimberly Mueller ruled on Feb. 26.
See also SJ Mercury News, 2/26/15.