104-C-166 US M9 Multi Purpose Bayonet System

Adopted in 1986 as the Multi Purpose Bayonet System, M9, it remains the current-issue U.S. Army bayonet. Following extensive trials, the design submitted by a California engineering firm, Phrobis III, Ltd., outperformed more than 40 proposed designs, many submitted by well-known firms. The M9 is a much more sophisticated (and costly) bayonet than its predecessors. The M9’s construction is heavier than the M4–M7 series bayonets; and, includes extra features like a wire-cutter and bottle opener. In addition, the M9 is a modular design, easily disassembled and repaired in the field.