I 
113TH CONGRESS 
1ST SESSION H. R. 3643 
To reauthorize the Undetectable Firearms Act of 1988 for 10 years and 
to close a loophole in the Act. 
IN THE HOUSE OF REPRESENTATIVES 
DECEMBER 3, 2013 
Mr. ISRAEL (for himself and Mr. KING of New York) introduced the following 
bill; which was referred to the Committee on the Judiciary 
A BILL 
To reauthorize the Undetectable Firearms Act of 1988 for 
10 years and to close a loophole in the Act. 
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 ‘‘Undetectable Firearms 
Modernization Act of 2013’’. 
SEC. 2. AMENDMENTS TO PROHIBITION ON UNDETECT-
ABLE FIREARMS. 
(a) EXTENSION
OF SUNSET PROVISION.—Section 
2(f)(2) of the Undetectable Firearms Act of 1988 (Public 
Law 100–649; 18 U.S.C. 922 note) is amended in the 
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matter preceding subparagraph (A) by striking ‘‘25’’ and 
inserting ‘‘35’’. 
(b) OTHER AMENDMENTS.—Section 922(p) of title 
18, United States Code, is amended— 
(1) in paragraph (1)— 
(A) in subparagraph (A), by striking 
‘‘grips, stocks, and magazines’’ and inserting 
‘‘all parts other than major components’’; and 
(B) in subparagraph (B), by striking 
‘‘when subjected to inspection by the types of x- 
ray machines commonly used at airports, does 
not generate’’ and inserting the following: ‘‘if 
subjected to inspection by the types of detection 
devices commonly used at airports for security 
screening, would not generate’’; 
(2) in paragraph (2)— 
(A) by striking subparagraph (B) and in-
serting the following: 
‘‘(B) the term ‘major component’, with respect 
to a firearm— 
‘‘(i) means the slide or cylinder, or the 
frame or receiver of the firearm; and 
‘‘(ii) in the case of a rifle or shotgun, in-
cludes the barrel of the firearm; and’’; and 
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(B) by striking subparagraph (C) and the 
proviso that follows and inserting the following: 
‘‘(C) the term ‘Security Exemplar’ means an 
object, to be fabricated at the direction of the Attor-
ney General, that is— 
‘‘(i) constructed of 3.7 ounces of material 
type 17–4 PH stainless steel in a shape resem-
bling a handgun; and 
‘‘(ii) suitable for testing and calibrating 
metal detectors.’’; 
(3) in paragraph (3)— 
(A) in the first sentence, by inserting 
after ‘‘of a firearm’’ the following: ‘‘, in-
cluding a prototype,’’; and 
(B) by striking the second sentence; 
and 
(4) in paragraph (5), by striking ‘‘shall not 
apply to any firearm which’’ and all that follows and 
inserting the following: ‘‘shall not apply to— 
‘‘(A) any firearm received by, in the possession 
of, or under the control of the United States; or 
‘‘(B) the manufacture, importation, possession, 
transfer, receipt, shipment, or delivery of a firearm 
by a licensed manufacturer or licensed importer pur-
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