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8/13/2026 7:55:14 AM EDT
[Last Edit: Bravo_Six][Edited]
Just started working on a can for a form approved in January.  I realize that I made an error and my form says 7 inches while my suppressor, as planned, will be 8 inches.  What is the process for getting the F1 amended?

(I'm in PA, so I don't know if the SSF v ATF case applies to me yet)


Disregard.  I decided to change plans and go with the 7 inch length listed on my form.
8/13/2026 10:33:39 AM EDT
[#1]
I'm going to drop this here in the event someone googles and finds it and/or MODs don't delete.

If you need to amend the length (to go longer) of an unbuilt silencer, do the following.

Send a letter to the ATF stating the new length and control number. State that the silencer is unbuilt. Make sure to sign in ink.

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