1. Short title This Act may be cited as the Make Identifiable Criminal Rounds Obvious Act or the MICRO Act . 2. Requirement that certain semiautomatic pistols manufactured, imported, or sold by Federal firearms licensees be capable of microstamping ammunition Section 923 of title 18, United States Code, is amended by adding at the end the following: (m) (1) (A) A person licensed under this chapter shall not manufacture, import, or transfer a semiautomatic pistol to which this subparagraph applies that is not capable of microstamping ammunition. (B) For purposes of subparagraph (A), a pistol is capable of microstamping ammunition if— (i) a microscopic array of characters that identify the make, model, and serial number of the pistol is etched into the breech face and firing pin of the pistol; and (ii) when ammunition is fired from the pistol, the characters are copied from the breech face and firing pin onto the cartridge case of the ammunition. (C) Subparagraph (A) shall apply only to semiautomatic pistols which— (i) are manufactured, or imported into the United States, on or after the effective date of this subsection; and (ii) have not been transferred to a person not licensed under this chapter. (2) Whoever violates paragraph (1) shall be fined an amount equal to— (A) in the case of a first such violation by the violator, $1,000 multiplied by the number of semiautomatic pistols involved in the violation; (B) in the case of a second such violation by the violator, $2,000 multiplied by the number of semiautomatic pistols involved in the violation