microstampingEtymologyFrom micro- + stamping.nounThe use of laser technology to engrave a microscopic marking onto the tip of the firing pin and onto the breech face of a firearm, so that spent cartridges give information about the firearm.“The measure would make California the first state to require that all new semiautomatic weapons be equipped with technology known as microstamping, which imprints microscopic markings as a gun fires.”