I am i the process of buying a new old stock Bolt Carrier for my HK 93. The seller assured me that it is factory HK German. However, the date code is HJ, and if HK follows the same date coding on there major parts, as they do on their weapons, HJ is not a valid date code, since J apperantly does not exist. Is this correct, or am I mistaken about the date code. It look like the real deal, with the finger/thumb grips milled in on the bolt where the ejection window would be, and seems in good shape, but this date discrepancy has me concerned it may not be real HK. Can anyone help with this?