I 
113TH CONGRESS 
1ST SESSION H. R. 1474 
To reauthorize the ban on undetectable firearms, and to extend the ban 
to undetectable firearm receivers and undetectable ammunition magazines. 
IN THE HOUSE OF REPRESENTATIVES 
APRIL 10, 2013 
Mr. ISRAEL introduced the following bill; which was referred to the Committee 
on the Judiciary 
A BILL 
To reauthorize the ban on undetectable firearms, and to 
extend the ban to undetectable firearm receivers and 
undetectable ammunition magazines. 
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’’. 
SEC. 2. FINDINGS. 
The Congress finds that— 
(1) according to data from the Federal Bureau 
of Investigation, 8,583 of the 12,664 murders in the 
United States in 2011 were committed using a fire-
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arm, and more than 57 percent of the murders that 
occurred in New York State were perpetrated with 
a firearm; 
(2) the ability to produce a receiver for a fire-
arm in the home would circumvent a number of 
laws, because the receiver is the component of the 
firearm that bears its serial number, as required by 
regulations; 
(3) digital manufacturing technologies, includ-
ing but not limited to computer numerical control 
mills (‘‘CNC mills’’), 3-dimensional printers (‘‘3D 
printers’’), and laser cutting machines, are quickly 
advancing to a point where it will soon be possible 
to fabricate fully operational firearm components; 
and 
(4) some commercially available products that 
utilize digital manufacturing technologies to manu-
facture objects are able to manufacture these objects 
using materials that are unable to be detected by 
traditional metal detectors, and may not present an 
accurate image on an x-ray. 
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SEC. 3. REAUTHORIZATION OF BAN ON UNDETECTABLE 
FIREARMS. 
Section 2(f)(2) of the Undetectable Firearms Act of 
1988 (18 U.S.C. 922 note) is amended by striking ‘‘25’’ 
and inserting ‘‘35’’. 
SEC. 4. BAN EXTENDED TO UNDETECTABLE FIREARM RE-
CEIVERS MADE BY INDIVIDUALS. 
Section 922(p) of title 18, United States Code, is 
amended— 
(1) in paragraph (1)— 
(A) in the matter preceding subparagraph 
(A), by striking ‘‘receive any firearm—’’ and in-
serting ‘‘receive—’’; and 
(B) by striking subparagraphs (A) and (B) 
and inserting the following: 
‘‘(A) any firearm— 
‘‘(i) that, after removal of grips, stocks, 
and magazines, is not as detectable as the Se-
curity Exemplar, by walk-through metal detec-
tors calibrated and operated to detect the Secu-
rity Exemplar; or 
‘‘(ii) any major component of which, when 
subjected to inspection by the types of x-ray 
machines commonly used at airports, does not 
generate an image that accurately depicts the 
shape of the component. Barium sulfate or 
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other compounds may be used in the fabrication 
of the component; or 
‘‘(B) any receiver for a rifle, or receiver for a 
handgun, manufactured by a person who is not a li-
censed manufacturer— 
‘‘(i) that is not as detectable as the Re-
ceiver Security Exemplar for a rifle or for a 
handgun, as the case may be, by walk-through 
metal detectors calibrated and operated to de-
tect that Receiver Security Exemplar; or 
‘‘(ii) which, when subjected to inspection 
by the types of x-ray machines commonly used 
at airports, does not generate an image that ac-
curately depicts the shape of the receiver. Bar-
ium sulfate or other compounds may be used in 
the fabrication of the receiver.’’; 
(2) in paragraph (2)— 
(A) by striking ‘‘and’’ at the end of sub-
paragraph (B); 
(B) by striking the period at the end of 
subparagraph (C) and inserting ‘‘; and’’; and 
(C) by adding at the end the following: 
‘‘(D) the term ‘Receiver Security Exemplar’ 
means, with respect to a rifle or a handgun, an ob-
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ject, to be fabricated at the direction of the Attorney 
General, that is— 
‘‘(i) constructed of, during the 12-month 
period beginning on the date of the enactment 
of this subparagraph, 3.7 ounces of material 
type 17–4 PH stainless steel in a shape resem-
bling the lower receiver for a rifle or for a 
handgun, as the case may be; and 
‘‘(ii) suitable for testing and calibrating 
metal detectors: 
Provided, however, That at the close of such 12- 
month period, and at appropriate times thereafter 
the Attorney General shall promulgate regulations to 
permit the manufacture, importation, sale, shipment, 
delivery, possession, transfer, or receipt of receivers 
for a rifle or receivers for a handgun, that were pre-
viously prohibited under this subparagraph that are 
as detectable as the ‘Receiver Security Exemplar’ for 
a rifle or for a handgun, as the case may be, which 
contains 3.7 ounces of material type 17–4 PH stain-
less steel, in a shape resembling the lower receiver 
for a rifle or for a handgun, as the case may be, or 
such lesser amount as is detectable in view of ad-
vances in state-of-the-art developments in weapons 
detection technology.’’; 
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(3) in paragraph (3)— 
(A) by inserting ‘‘or receiver’’ after ‘‘fire-
arm’’ each place it appears; and 
(B) by inserting ‘‘or receivers’’ after ‘‘fire-
arms’’; and 
(4) in each of paragraphs (4) through (6), by 
inserting ‘‘or receiver’’ after ‘‘firearm’’ each place it 
appears. 
SEC. 5. BAN EXTENDED TO UNDETECTABLE AMMUNITION 
MAGAZINES MADE BY INDIVIDUALS. 
Section 922(p) of title 18, United States Code, as 
amended by section 3 of this Act, is amended— 
(1) in paragraph (1)— 
(A) by striking ‘‘or’’ at the end of subpara-
graph (A)(ii); 
(B) by striking the period at the end of 
subparagraph (B) and inserting ‘‘; or’’; and 
(C) by adding at the end the following: 
‘‘(C) any ammunition magazine, manufactured 
by a person who is not a licensed manufacturer— 
‘‘(i) that, after removal of the spring and 
follower, is not as detectable as the Magazine 
Security Exemplar, by walk-through metal de-
tectors calibrated and operated to detect the 
Magazine Security Exemplar; or 
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‘‘(ii) which, when subjected to inspection 
by the types of x-ray machines commonly used 
at airports, does not generate an image that ac-
curately depicts the shape of the magazine.’’; 
(2) in paragraph (2)— 
(A) by striking ‘‘and’’ at the end of sub-
paragraph (C); 
(B) by striking the period at the end of 
subparagraph (D) and inserting ‘‘; and’’; and 
(C) by adding at the end the following: 
‘‘(E) the term ‘Magazine Security Exemplar’ 
means an object, to be fabricated at the direction of 
the Attorney General, that is— 
‘‘(i) constructed of, during the 12-month 
period beginning on the date of the enactment 
of this subparagraph, 1 ounce of material type 
17–4 PH stainless steel in a shape resembling 
an ammunition magazine; and 
‘‘(ii) suitable for testing and calibrating 
metal detectors: 
Provided, however, That at the close of such 12- 
month period, and at appropriate times thereafter 
the Attorney General shall promulgate regulations to 
permit the manufacture, importation, sale, shipment, 
delivery, possession, transfer, or receipt of ammuni-
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tion magazines previously prohibited under this sub-
paragraph that are as detectable as a ‘Magazine Se-
curity Exemplar’ which contains 1 ounce of material 
type 17–4 PH stainless steel, in a shape resembling 
an ammunition magazine, or such lesser amount as 
is detectable in view of advances in state-of-the-art 
developments in weapons detection technology.’’; 
(3) in paragraph (3)— 
(A) by striking ‘‘firearm or receiver’’ each 
place it appears and inserting ‘‘firearm, re-
ceiver, or ammunition magazine’’; 
(B) by striking ‘‘firearms or receivers’’ and 
inserting ‘‘firearms, receivers, or ammunition 
magazines’’; and 
(4) in each of paragraphs (4) through (6), by 
striking ‘‘firearm or receiver’’ each place it appears 
and inserting ‘‘firearm, receiver, or ammunition 
magazine’’. 
Æ 
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