Pulled the stock again today to look. There are aluminum cylinders inside the stock, but the don't extend to the end of the screw channel on the action side. The screw head side is resting on the metal instead of plastic. Didn't see any indication that the plastic had been compressed yet. I'm going to torque up to 50-60 to see if there's any change.

Click image for larger version.  Name: 20190924_145622.jpg  Views: 72  Size: 259.6 KB  ID: 79028