In 2007 California enacted a law banning the sale of handguns that lack the ability to imprint the weapon's make, model, and serial number on the cartridge when the bullet is fired. The purpose of the law is fairly obvious. Imprinting information that identifies the weapon on the cartridge would aid in investigating shootings. The law took effect in 2013.
In Pena v. Cid, 09-cv-01185, in the United States District Court for the Eastern District of California, Judge Kimberly Mueller ruled that this requirement did not implicate the Second Amendment right to bear arms. She ruled that the Second Amendment does not guarantee a right of access to a particular type of handgun.
http://www.bloomberg.com/news/articles/2015-02-27/california-gun-microstamping-law-is-upheld-by-federal-judge
http://www.mercurynews.com/crime-courts/ci_27616476/federal-court-rejects-challenge-california-gun-safety-law
http://www.ocregister.com/articles/california-652651-law-microstamping.html
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