If you want a bayonet that would have been what was in use when your rifle was new, it would be a long one. They first started making new bayonets again in 1942 and they were long but soon afterward they decided they wanted them short. The majority of the long 1942 bayonets were cut in arsenals. Yours could have had an earlier long bayonet too to be what might have been used on it when it was new - Of course a year or so after your M1came out, any type bayonet would be 'proper' -
I have a 1942 that hasn't been cut -
Also an early long bayonet that was arsenal overhauled for WWII
Personally, I like the bowie cut bayonets on M1's. I just like the way they look. I have two of them
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