Hey all just because I have an Idea of how to make the 3 sided knife in my head, look up a M1917 Trench Fighting Knife, I'd post pics of it myself but I'm at work and can't, my dad has one, they were made from cut down Trapdoor Bayonets.
Robert Hedricksons work is great & he's a cool guy to boot.
I love the old sgt. Here is a third ref for anyone interested in Kal & Walon it's done by Tom Hodges ( the artist who did the first Insider article art ).
Enjoy.