I 
115TH CONGRESS 
1ST SESSION H. R. 3458 
To require certain semiautomatic pistols manufactured, imported, or sold 
by Federal firearms licensees to be capable of microstamping ammuni-
tion, and to prohibit the removal, obliteration, or alteration of the micro-
stamped code or microstamping capability of a firearm. 
IN THE HOUSE OF REPRESENTATIVES 
JULY 27, 2017 
Mr. BROWN of Maryland (for himself, Mr. BRADY of Pennsylvania, Mr. 
CICILLINE, Mr. CONNOLLY, Mr. GUTIE´RREZ, Mr. LARSON of Con-
necticut, Mr. MCEACHIN, Ms. NORTON, Mr. RASKIN, Ms. SCHAKOWSKY, 
Mr. SERRANO, Mr. SUOZZI, and Mr. VARGAS) introduced the following 
bill; which was referred to the Committee on the Judiciary 
A BILL 
To require certain semiautomatic pistols manufactured, im-
ported, or sold by Federal firearms licensees to be capa-
ble of microstamping ammunition, and to prohibit the 
removal, obliteration, or alteration of the microstamped 
code or microstamping capability of a firearm. 
Be it enacted by the Senate and House of Representa-
tives of the United States of America in Congress assembled, 
SECTION 1. SHORT TITLE. 
This Act may be cited as the ‘‘Make Identifiable 
Criminal Rounds Obvious Act’’ or the ‘‘MICRO Act’’. 
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SEC. 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 pis-
tol 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 iden-
tify 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 semiauto-
matic 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. 
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‘‘(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 semi-
automatic 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; or 
‘‘(C) in the case of a third such violation by the 
violator, $3,000 multiplied by the number of semi-
automatic pistols involved in the violation.’’. 
SEC. 3. PROHIBITION ON THE REMOVAL, OBLITERATION, 
OR ALTERATION OF THE MICROSTAMPED 
CODE OR MICROSTAMPING CAPABILITY OF A 
FIREARM. 
(a) IN GENERAL.—Section 922 of title 18, United 
States Code, is amended by inserting after subsection (t) 
the following: 
‘‘(v)(1) It shall be unlawful for any person to remove, 
obliterate, or alter the microstamped code or micro-
stamping capability of a firearm that has been shipped 
or transported in interstate or foreign commerce. 
‘‘(2) Paragraph (1) shall not apply to the replace-
ment of a firing pin that is damaged or worn, and is in 
need of replacement.’’. 
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(b) PENALTIES.—Section 924 of such title is amend-
ed by adding at the end the following: 
‘‘(q)(1)(A) In the case of a knowing violation of sec-
tion 922(v), the Attorney General may, after notice and 
opportunity for hearing— 
‘‘(i) subject the violator to a civil penalty in an 
amount equal to not more than $5,000; and 
‘‘(ii) if the violator is a licensed manufacturer, 
licensed importer, or licensed dealer, suspend for not 
more than 6 months, or revoke, any license issued 
to the licensee under this chapter. 
‘‘(B) An action under subparagraph (A) may be re-
viewed only as provided under section 923(f). 
‘‘(2) The suspension or revocation of a license or the 
imposition of a civil penalty under paragraph (1) shall not 
preclude any administrative remedy that is otherwise 
available to the Attorney General.’’. 
SEC. 4. EFFECTIVE DATE. 
The amendments made by this Act shall take effect 
on the date that is 2 years after the date of the enactment 
of this Act. 
Æ 
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