Ok, my rifle sn. 798 has the bolt detent on the bottom of extractor. But no hole for the bolt stop pin. Sorry should of be more clear on that.
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Just learned something new about a rifle i have owned for over 30 plus years.
1963B No hole
Thank You.
I have 1807B, which I believe is an authentic double-converted M1922.
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Art
1510A has the hole, but not the hold open device.