Phrobis Product Improved M9

[Carlo]

Originally Posted by pwcosol

The screw hole on the cutterplate (the one on the right as you look at the rear of the cutterplate) is drilled straight through. On the production model scabbard the hole is stepped on the inside to provide additional tightening of the screw. This helps to compensate for wear if the plate is subjected to heavy usage.

Looking back at the Finn patent, I found a clear description of what we were talking about