Winchester invented the M1 Carbine, so if you’re going to have one, a Winchester would be my first choice. Yours is in the second to last serial number block assigned to Winchester, and they ceased production of M1 and M2 Carbines in August 1945. Yours was probably made around February of 1945, give or take a month.
Should have an overlaid PW proof on the barrel, besides the WRA near the front sight. You have a period correct, late production, Winchester stock, as indicated by the oiler inlet shape, the W on the left, and the correct US Army Ordnance marking on the right side
Typical post-war updates and signs of refurbishment: barrel band with bayonet lug, HI safety (Inland sub-contractor).
Nice score!