studies indicated microstamp something unreliable. serves no safety purpose. it's cost prohibitive and, most importantly, is not proven to aid in preventing or solving crimes and gun store owners say ultimately this will end up hurting gun owners in california. >> manufacturers. >> responsible firearm owners are not the problem. they are being constantly picked on because they just don't like guns in california. >> on the flip side, gun control advocates are celebrating this new law in a statement the law center to prevent gun violence says the california legislature decided to listen to law enforcement and require this common sense improvement to handguns to help bring criminals to justice in a way california may be under the microscope here because now several groups are actually challenging this law in court. some other states are actually looking at possibly implementing the microstamping technology. but they may actually wait until all the dust settles to see exactly how they want to move forward.