Here is a link someone sent me some time ago.......The lock-bar rear sight on a Garand IS the second model. The ORIGINAL rear sight looked like the (common) third model, just put together backwards. It was famous for slipping out of range adjustment and so was replaced with one that didn't slip, even though the thing had to be unlocked before the adjustment had to be made. Finally, the problem was attacked properly, the third sight was designed and put into production and the problem solved at last. The result is that the Garand has likely the best sights of any semi-auto military rifle. It's all in Hatcher's "Book of the Garand".
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Sounds okay for a March rifle, anyway. What month was the rifle built?
In the Service, barrels on these critters were changed-out whenever there was excessive wear or damage to the existing barrel. I once sold a 1938 Garand which had a 1943 barrel on it: absolutely corect for a rifle which had seen a lot of action, as that one had. It also had the second type rear sight with the lock bar, much too late for the very early receiver.
Sounds as if you're putting together a strictly wartime rifle.
Good luck!
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I do have to laugh a bit on the "correct parts thingy" The armourers were only interested in turning out serviceable rifles to be issued or re-issued. The next part in the bin was fitted if the original one needed replacement regardless of who made it or when it was made.
Keep in mind these rifrles were used in WW2, Korea, and even Vietnam.



























