[Code of Federal Regulations]
[Title 27, Volume 3]
[Revised as of April 1, 2007]
From the U.S. Government Printing Office via GPO Access
[CITE: 27CFR478.39]

[Page 36-37]
 
            TITLE 27--ALCOHOL, TOBACCO PRODUCTS, AND FIREARMS
 
   CHAPTER II--BUREAU OF ALCOHOL, TOBACCO, FIREARMS, AND EXPLOSIVES, 
                          DEPARTMENT OF JUSTICE
 
PART 478_COMMERCE IN FIREARMS AND AMMUNITION--Table of Contents
 
          Subpart C_Administrative and Miscellaneous Provisions
 
Sec.  478.39  Assembly of semiautomatic rifles or shotguns.

    (a) No person shall assemble a semiautomatic rifle or any shotgun 
using more than 10 of the imported parts listed in paragraph (c) of this 
section if the assembled firearm is prohibited from importation under 
section 925(d)(3) as not being particularly suitable for or readily 
adaptable to sporting purposes.
    (b) The provisions of this section shall not apply to:
    (1) The assembly of such rifle or shotgun for sale or distribution 
by a licensed manufacturer to the United States or any department or 
agency thereof or to any State or any department, agency, or political 
subdivision thereof; or
    (2) The assembly of such rifle or shotgun for the purposes of 
testing or experimentation authorized by the Director under the 
provisions of Sec.  478.151; or
    (3) The repair of any rifle or shotgun which had been imported into 
or assembled in the United States prior to November 30, 1990, or the 
replacement of any part of such firearm.
    (c) For purposes of this section, the term imported parts are:
(1) Frames, receivers, receiver castings, forgings or stampings
(2) Barrels
(3) Barrel extensions
(4) Mounting blocks (trunions)
(5) Muzzle attachments
(6) Bolts
(7) Bolt carriers

[[Page 37]]

(8) Operating rods
(9) Gas pistons
(10) Trigger housings
(11) Triggers
(12) Hammers
(13) Sears
(14) Disconnectors
(15) Buttstocks
(16) Pistol grips
(17) Forearms, handguards
(18) Magazine bodies
(19) Followers
(20) Floorplates

[T.D. ATF-346, 58 FR 40589, July 29, 1993]