I 

117TH CONGRESS 

1ST SESSION H. R. 1477 

To modernize the Undetectable Firearms Act of 1988. 

IN THE HOUSE OF REPRESENTATIVES 

MARCH 2, 2021 

Ms. DEAN (for herself, Mr. LANGEVIN, Ms. JACKSON LEE, Mr. COHEN, Ms. 

NORTON, Ms. SCANLON, Mr. TRONE, Ms. HOULAHAN, Mr. BLUMENAUER, Mr. RASKIN, Mr. SWALWELL, Mrs. MCBATH, Mr. SOTO, Mr. 

CA ́RDENAS, Mr. MICHAEL F. DOYLE of Pennsylvania, Ms. WILSON of 

Florida, Ms. SCHAKOWSKY, Mr. CICILLINE, Mr. CARSON, Ms. GARCIA of 

Texas, Mrs. CAROLYN B. MALONEY of New York, Mr. HUFFMAN, Mr. 

MALINOWSKI, Mr. HASTINGS, Mr. MCNERNEY, Mr. NORCROSS, Mr. GRIJALVA, Mr. KHANNA, and Mr. SCHNEIDER) introduced the following bill; 

which was referred to the Committee on the Judiciary 

A BILL 

To modernize the Undetectable Firearms Act of 1988. 

1 Be it enacted by the Senate and House of Representa2 tives of the United States of America in Congress assembled, 

3 SECTION 1. SHORT TITLE. 

4 This Act may be cited as the ‘‘Undetectable Firearms 

5 Modernization Act’’. 


pbinns on DSKJLVW7X2PROD with BILLS
2 

•HR 1477 IH

1 SEC. 2. MODERNIZATION OF THE PROHIBITION ON 

2 UNDETECTABLE FIREARMS. 

3 Section 922(p) of title 18, United States Code, is 

4 amended— 

5 (1) in paragraph (1)— 

6 (A) in subparagraph (A), by striking 

7 ‘‘grips, stocks, and magazines, is not as detect8 able as the Security Exemplar, by walk-through 

9 metal detectors calibrated and operated to de10 tect the Security Exemplar’’ and inserting ‘‘all 

11 parts other than major components, does not 

12 contain detectable material’’; and 

13 (B) in subparagraph (B), by striking 

14 ‘‘when subjected to inspection by the types of x15 ray machines commonly used at airports, does 

16 not generate’’ and inserting the following: ‘‘if 

17 subjected to inspection by the types of detection 

18 devices commonly used at airports for security 

19 screening, would not generate’’; 

20 (2) in paragraph (2)— 

21 (A) by striking subparagraph (B) and in22 serting the following: 

23 ‘‘(B) the term ‘major component’, with respect 

24 to a firearm— 

25 ‘‘(i) means the slide or cylinder, or the 

26 frame or receiver of the firearm; and 


pbinns on DSKJLVW7X2PROD with BILLS
3 

•HR 1477 IH

1 ‘‘(ii) in the case of a rifle or shotgun, in2 cludes the barrel of the firearm; and’’; and 

3 (B) by striking subparagraph (C) and the 

4 proviso that follows and inserting the following: 

5 ‘‘(C) the term ‘detectable material’ means mate6 rial that produces a magnetic field that is equivalent 

7 in strength to the magnetic field produced by 3.7 

8 ounces of 17–4 PH stainless steel.’’; 

9 (3) in paragraph (3)— 

10 (A) in the first sentence, by inserting 

11 after ‘‘of a firearm’’ the following: ‘‘, in12 cluding a prototype,’’; and 

13 (B) by striking the second sentence; 

14 and 

15 (4) in paragraph (5), by striking ‘‘shall not 

16 apply to any firearm which’’ and all that follows and 

17 inserting the following: ‘‘shall not apply to— 

18 ‘‘(A) any firearm received by, in the possession 

19 of, or under the control of the United States; or 

20 ‘‘(B) the manufacture, importation, possession, 

21 transfer, receipt, shipment, or delivery of a firearm 

22 by a licensed manufacturer or licensed importer pur23 suant to an existing contract with the United 

24 States.’’. 

Æ 


pbinns on DSKJLVW7X2PROD with BILLS