Another good point that hasn't been mentioned is the fact that the liner lock is very easy to keep clean in a dirty, sandy environment. I have worked in sandy areas before and it is pretty much impossible to keep lock backs from getting bunged up with sand.
If I was going to be deployed to a sandy area, I would want something easy to keep clean like a Walker Liner Lock, R.I.L., or compression lock. Simple, lightweight, and easy to keep clean. Sounds perfect for a soldier to me.
And as to lock strength, I know that Sal has mentioned in the past that they test and break locks in their facility for their own information. I have complete confidence that when I buy a Spyderco, it has been designed to not only be light and effective, but strong enough for any conceivable and proper use of a folding knife.
I love my Tuff and my M390 Military. If I'm cutting up miles of cardboard, I grab my Millie. If I'm going to be doing something a little nasty, I use the Tuff or a fixed blade etc. etc.
Just my 2 cents. :thumbup:
*this thread needs pictures.