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Rifle Scopes Nightforce serial number suffix (A/B)

IsaacL

computer_carnivore
Minuteman
Jul 24, 2019
44
33
Does anyone know the difference between serials with an "A" suffix vs "B" suffix (e.g. AA00000A & AA00000B)? I noticed this while shopping for a used ATACR 7-35 (Mil-XT). Are there different revisions? Is one newer than the other? Serials don't appear to be sequential between the two.
 
I think there is no difference. We are a decent size Nightforce dealer, and I just looked in our stockroom, and probably 60/40 in favor the A, but the B is clearly not a blem. C- is commercial and M- is military, however, we have a few military scopes that have a C-, which is probably due to warranty issues.