DEPARTMENT OF THE TREASURY 
            BUREAU OF ALCOHOL, TOBACCO AND FIREARMS 
                      WASHINGTON, DC 20226

                           MAR 13 1999

                                                  903050:GKD
                                                  3311



Dear Mr. :

This refers to your letter of November 1998, requesting information
on the legality of alterations you propose to an Uzi Model A
Carbine, 9mm Luger caliber, that has previously been converted to
a machinegun and entered into the National Firearms Registration
and Transfer Record.  You state that the firearm receiver is the
registered component due to the following modifications carried out
by a Class 2 manufacturer to alter it to a machinegun configuration
frame or receiver:

- Removal of the bolt block.

- Replacement of the semiautomatic configuration bolt by a
machinegun bolt, machined to clear the barrel retaining ring.

- Modification of trigger assembly/housing to afford a third
position for the selector.

- Modification of selector to allow a full automatic position.

- Shortening of the barrel to an unspecified length.

- Stamping of the Class 2 manufacturer's name on the lower area of
the receiver surrounding the trunnion.

                              - 2 -

Mr. 

The alterations you propose are as follows and can be accomplished
by you.

1. Removal of the barrel retaining ring and recontouring or
replacement of the feed ramp.

2. Boring the trunnion to allow installation of a standard Uzi
machinegun type barrel.

3. Opening the sear holes in the receiver to allow use of a
machinegun configuration sear.

4. Changing the retaining lughole from a 9mm size to 8mm, to allow
use of an Uzi machinegun type trigger housing assembly.

5. Installation of an Uzi machinegun type trigger housing assembly.

6. Installation of an unmodified machinegun bolt.

7. Installation of a machinegun configuration top cover.

8. Alteration of the factory markings on the left rear of the
receiver in order to duplicate the Uzi machinegun type markings in
that location.

There are no provisions under the NFA prohibiting these proposed
alterations to your registered machinegun with the following
requirements:

The altered trigger housing assembly that would be removed from the
firearm is in itself a combination of parts designed to convert a
weapon into a machinegun, hence, is a "machinegun" as defined in
the NFA.  The assembly would have to be destroyed upon removal/
separation from the firearm.

                              - 3 -

Mr. 

The markings, especially the serial number, on the right rear of
the receiver may not be altered or obliterated.  Additionally, the
markings applied by the Class 2 manufacturer on the lower part of
the receiver must not be altered or obliterated.

We suggest that you notify the NFA Branch of ATF in writing of
these alterations.  We trust that the foregoing has been responsive
to your inquiry.  If we can be of any further assistance, please
contact us.

                        Sincerely yours,


                            [signed]
                       Edward M. Owen, Jr.
                 Chief, Firearms Technology Bran