first adjustable sights used how early

[painter777]

Could the adjustable rear sight possibly have been used as early as Feb 1944?

Not on a M1 Carbine.
First style rear adj sight was called a T21 which would allow for elevation and windage . It was recommended for adoption on Jan 14, 1943, approved on Feb 11, 1943, but then cancelled in Nov of 43 IIrC. This T21 was the model never used, but lets say improved to bring about what we know today as: The Milled and Stamped rear sights. With that said....... The Modifications to the T21 were worked on thru the summer and early fall of 1943. Now the new and improved (accepted) Milled and Stamped rear sights both came in to supply at about the same time. Orders being placed about April of 1944 and use beginning in May of 1944. They were limited in supply and slow to get around. Inland started using rear adj sites earlier than most, like the above May 44 date. Winchester was later in the year of 44.

Now I could be all wet.... but this is the information I recall. Adj rear sights... roughly May-June of 1944 and as supplied until end of production.

BTW... Welcome To The Forum,

Cheers,
Charlie-Painter777

P.S. Bruce and Bobg from Nigeria, How'd I do ?

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