You really are challenging the memory. There are the obvious screws on the bottom. I believe there is a piece that goes vertically into the stock and is pinned horizontally. You have to take the lock out to access the pin. I think anyway. Again, it's been years.
Here's mine from hard to believe it but a little over four years ago, unfortunately, I don't think the photos will help much with your questions: https://www.milsurps.com/showthread.php?t=62755Information
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