thanks for all the quick responses fellas.  I will get a couple of pics up when I get home tonight.  The J actually looks very professional, much like the "A" stamp pic that was posted.  I have found a few more pics out there on Google that look the same as my rifle..so I am guessing it must have been a process mark at some point of the rifles like (and return to the depot). here is a pic that found on google. check out upper right.

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