Gun manufacturers more loyal to their customers than to promoting the safety of their products are protesting a recent California law requiring a unique microstamp on bullet casings, the Los Angeles Times reported.

The marker would leave an imprint on bullets as they are fired, a process gun makers claim adds dollars to the manufacturing process without adding proven results. Lawmakers claim it will significantly help police track a bullet to its source.

"Smith & Wesson does not and will not include microstamping in its firearms," the company said in a statement on Thursday. "A number of studies have indicated that microstamping is unreliable, serves no safety purpose, is cost prohibitive and, most importantly, is not proven to aid in preventing or solving crimes."

Though microstamping is now required by law in California, Smith & Wesson, as well as fellow maker Sturm, Ruger, & Co., will stop selling newly designed guns in the state in protest, according to the LA Times. Since the law covers only new guns and updates on old models, the companies will only offer copies of products already in existence, restricting Californians from accessing "the best products with the latest innovations," according to Smith & Wesson President and Chief Executive James Debney.

The man who first introduced the law, Mike Feuer, now the Los Angeles City Attorney, calls its objections "bogus" and accuses its objectors of "posturing," according to the LA Times.

"This law is about solving gun crimes, and it's a law that would be effective in doing that if only the gun lobby would step aside," Feuer said. "Their posturing doesn't surprise me. We all know that the gun lobby has no problem innovating when it comes to making guns more lethal."

According to Feuer, microstamping adds just a few dollars per gun and has been proven effective long before the law was passed in 2007 (but first implemented in May 2007).