1944 Inland

[INLAND44]

A 4-44 barrel may be too late for the receiver. A 4.9 will have a 1-44 barrel, and it's not that far to 5.1 at the rate they were making them at that time. I would expect a 2-44, MAYBE a 3-44. But hey, I am definitely not an authority on these things. My 4.9/1-44 is a rebuild but I have seen a 2-44 barrel in beautiful original condition. It was dark gray Parkerizing, not black like Black Oxide. The barrels at that time were usually dated a month or two before the carbine shipping date. Your 5.1 was probably shipped in March or April.

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[deldriver]

A 4-44 barrel may be too late for the receiver. A 4.9 will have a 1-44 barrel, and it's not that far to 5.1 at the rate they were making them at that time. I would expect a 2-44, MAYBE a 3-44. But hey, I am definitely not an authority on these things. My 4.9/1-44 is a rebuild but I have seen a 2-44 barrel in beautiful original condition. It was dark gray Parkerizing, not black like Black Oxide. The barrels at that time were usually dated a month or two before the carbine shipping date. Your 5.1 was probably shipped in March or April.

I checked in my CCNL featuring this particular serial block and their recorded data sheets showed 4-44 barrels on serials 5, 073xxx to 5,244xxx. Maybe on some point we can see some pictures of the OP's carbine.