It looks to me that a 54 should fit on it. I have a 1920 with the 54 & the part of the bolt where it mounts is a little bit (maybe 1/4 ") longer then your's but it looks like it will fit. Before you do anything with it wait until you find a 54. The only hang up I see is that the drilled holes you will need in the bolt may be a little to close to the where the bolt was machined.
Living in the Land of Sunshine & No Basements
"Any man who thinks he can be happy and prosperous by letting the government take care of him, better take a closer look at the American Indian"
Semper Fi The Old Corps Era of the M-1 Garand�
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