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Spotter’s Report: IBM AO Carbine Receive Ring

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m1a1fan View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote m1a1fan Quote  Post ReplyReply Direct Link To This Post Topic: Spotter’s Report: IBM AO Carbine Receive Ring
    Posted: Feb 09 2019 at 6:51pm
The following was observed on an AO IBM carbine. In addition to the multiple stamps, it’s strange to see different fonts on the same receiver ring like the A and E. They look like IBM’s and AO’s, but not sure how could that be possible?

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Post Options Post Options   Thanks (0) Thanks(0)   Quote David Albert Quote  Post ReplyReply Direct Link To This Post Posted: Feb 09 2019 at 9:03pm
I'm wondering whether this may have been where a die was changed out. It looks to have chattered at least twice on each die.

David Albert
dalbert@sturmgewehr.com
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Post Options Post Options   Thanks (0) Thanks(0)   Quote m1a1fan Quote  Post ReplyReply Direct Link To This Post Posted: Feb 09 2019 at 9:49pm
Yup, that is what I was thinking as well. CCNL 345-6 shows the receiver ring fonts for IBM and AO and they look different. The flat top 3 is shown as IBM. The top A in Carbine looks like IBM. The serif 1 is shown as IBM. The bevel is marked AO. Hard to tell for sure with such a poor stamping. How would one determine which stamps were made first?
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