madsenshooter wrote on Sep 29^th, 2017 at 2:59am:

. . . Title 18 reads the same! . . .

Are you sure about Title 18? Text I found at GPO site seems to apply the "no longer manufactured" bit only to replicas. Note the "or" here -

(16) The term “antique firearm” means—

(A) any firearm (including any firearm with a matchlock, flintlock, percussion cap, or similar type of ignition system) manufactured in or before 1898; or

(B) any replica of any firearm described in subparagraph (A) if such replica—

(i) is not designed or redesigned for using rimfire or conventional centerfire fixed ammunition, or

(ii) uses rimfire or conventional centerfire fixed ammunition which is no longer manufactured in the United States and which is not readily available in the ordinary channels of commercial trade;

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Confusion may arise from the fact that "firearm" under the NFA is a tighter definition, covering only the short-barrel types, machineguns, silencers, "destructive devices". Consequently, a pre-1899 7mm "potato digger" is a non-antique "firearm" under Title 26, but that '96 Krag would be antique per Title 18 - unless I'm missing something. (Not a lawyer!)