Assume the following scenario:

(1) I buy a plain barrel of xx" length

(2) BEFORE it is ever attached to an upper or a rifle, I have the barrel cut down to, say, 14.75 inches and have it recrowned.

(3) I then attach one of the many ATF-approved muzzle brakes, and have a competent 'smith weld it into place, resulting in an overall, "unalterable" barrel >16" in length.

(4) I then go on about my business and call this "post ban legal".

Am I screwed, or is this OK?

TiA
CS79

Legal

(I am not a lawyer, but many manufacturers already do this)