Aperture sights were pretty much standard in WWII for the US. I think the only rifle w/o a rear aperture sight was the M1903 Springfield. I have an M1 Carbine, and it has the aperture on it. And Im getting an M1 Garand soon. It has them too. Id love to get a Thompson. But they are really expensive, and to get one you have to get it registered as a short barreled rifle.
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