Buck 104 Compadre Camp Knife runs a 4.5″ drop point blade in 5160 Spring Steel; Buck 863 Selkirk runs 4.625″ of drop point in 420HC. The Buck 104 Compadre Camp Knife is the lighter of the two by 0.50 oz.
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Buck 104 Compadre Camp Knife · Drop Point
4.5″ blade · 0.15″ spine · 7.1 oz · ~1.25″ tall
Buck 863 Selkirk · Drop Point
4.625″ blade · 0.135″ spine · 7.6 oz · ~1.25″ tall (derived) · family outline
Spine thickness, same scale
0.15″
0.135″
Length and spine thickness drawn to true scale from published specs. Outlines traced from makers' photos, except where marked as the shape family's.