Well, I have an 03/A3 and read the serial number off the rifle, not sure how it could be wrong... I do have lousy eyesight these days but that's big enough to read pretty easily.
I assumed the FJA would be correct but hate to assume so thanks. Can't give you any other serial number, that's the one.

One interesting thing about the barrel band where the serial number, arsenal and model type is stamped, mine starts "outboard" from the muzzle area, as if it was offset so part of the
number is covered by the barrel band, seems odd. Assuming the band should fit up against
the protruding notch, where I've seen most all of them fit, it does cover some of the imprint
on that identifying band....