Making a MG into SBR?

[Gaffshot]

If you own a registered transferable M16 mg do you need anything additional to put a short barrel on it?  Must you do a new form 1 to make it into a SBR?  Would you need to engrave info on it in addition to what's already on the MG paperwork?  

What about Uzi's and other subguns which already have barrel under 16" does their paperwork list MG and SBR or just MG?

[mactactical]

Machine gun trumps everything, barrel length doesn't matter. 

[Gaffshot]

Thank you for the reply.  Is this the general consensus?  Does anyone have a differing opinion?  I think that is the correct answer but does anyone have any authority to rely upon?  I sure don't want to make presumptions about something as important as nfa rules.

[Precision Technology]

On April 22, 2016 at 1:22 PM, mactactical said:

Machine gun trumps everything, barrel length doesn't matter. 

Mark (mactactical) is Correct. You are good to go. There would be an issue if you had a Transferable RDIAS in a regular Title I AR15, you shortened the barrel of the AR15 and then removed the RDIAS. In doing this, you would have created an Unregistered SBR. In your case, the M16 is a Registered Transferable MG and may have any barrel length you desire without any further registration or notification.

[Precision Technology]

On April 22, 2016 at 0:56 PM, Gaffshot said:

What about Uzi's and other subguns which already have barrel under 16" does their paperwork list MG and SBR or just MG?

The transfer forms almost always list SMG for the SMGs you mentioned, however, there are exceptions (errors) to be found in the NFRTR and on various transfer forms. That is the nature of the beast as humans are imperfect and mistakes are sometimes introduced, missed and perpetuated. Many of these may be corrected with effort on the part of the current owner. Most are inconsequential and the majority of people will not waste their time in those cases.

Edited April 25, 2016 by Precision Technology
Forgot to Add Color

[J237]

On April 22, 2016 at 4:22 PM, mactactical said:

Machine gun trumps everything, barrel length doesn't matter. 

They both are correct as stated above.  Nothing more needs to be done as it is a machinegun.

[Patrick]

18 USC 921 (a)

(7) The term “rifle” means a weapon designed or redesigned, made or remade, and intended to be fired from the shoulder and designed or redesigned and made or remade to use the energy of an explosive to fire only a single projectile through a rifled bore for each single pull of the trigger.

(8) The term “short-barreled rifle” means a rifle having one or more barrels less than sixteen inches in length and any weapon made from a rifle (whether by alteration, modification, or otherwise) if such weapon, as modified, has an overall length of less than twenty-six inches.

 

A machine gun does not meet the definition of a rifle, so a short barreled machine gun is not a short barreled rifle.