Bill,
Didn't mean you Hijacked.
Just thought a new post would have brought more attention.
Someone other than I would have a better guess as to your born on date.
I HAD some WRA production dates noted, but as stated they've been lost.
I guessed Mid March-Mid April of 43. Gut wants to say more towards the early part of March.
At 1000 + carbines a day........ anything could have been possible.
I do believe your barrel to be correct.

Good Day Guys,
Charlie