The M9 Bayonet is a multi-purpose knife and bayonet officially adopted in 1984 by the U.S. Army. It has a 7-inch blade and is issued with a sheath designed to double as a wire cutter. The M9 ...

Every good adventurer, mechanic ... which already included things like a bayonet, knife, and can opener (to open canned food). So, the Swiss Army began workshopping a design that combined all ...