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Unread 10-18-2022, 01:27 PM   #8
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Looking at the pictures of the AAHE in the DGJ, the vent rib exhibits the concave ramp to match a regular frame with the concave top of the standing breech, which I would attribute to a retrofit vent rib.

Some vent ribs with the flat-topped standing breech and the flat surface ramp which I would consider guns built from the ground up as vent rib guns --

227370 02.jpg

230737 04.jpg

232169 02.jpg

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