Can someone help me out with the meanings of the barrel/receiver markings on my new 336C? The serial# on the receiver is "MR97XXXB" On the left side of the barrel in inscribed Marlin Firearms Co. North Haven, CT. USA. not ILion, NY. To the rear of the barrel near the receiver is 3 EG 99.. On the right side of the barrel (Loading Gate Side) is REP in an oval with a"K" stamped outside the oval. I think that is the proof mark and the initial of the proof technician. REP, I believe, means it was proof fired in ILion,NY. When I called Marlin Cust Service to register for Warranty I was told the date of manufacure was 2nd Quarter 2012. I'm wondering if maybe the barrel was made in North Haven in 1999. The other explanation is that the ILion factory is still stamping the barrels "Marlin Firearms North Haven, CT. USA" Any help decoding the markings would greatly be appreciated. Thanks.