Full assembled models of Fairbairn–Sykes knife, M7 and M9 bayonets.

The Fairbairn–Sykes fighting knife is a double-edged fighting knife resembling a dagger or poignard with a foil grip developed by William Ewart Fairbairn and Eric Anthony Sykes in Shanghai based on concepts which the two men initiated before World War II while serving on the Shanghai Municipal Police in China.The F–S fighting knife was made famous during World War II when issued to British Commandos, the Airborne Forces, the SAS and many other units, especially for the Normandy landings in June 1944. With its acutely tapered, sharply pointed blade, the F–S fighting knife is frequently described as a stiletto, a weapon optimised for thrusting, although the F–S knife is capable of being used to inflict slash cuts upon an opponent when its cutting edges are sharpened according to specification. The Wilkinson Sword Company made the knife with minor pommel and grip design variations.

The M7 bayonet is a bayonet that was used by the U.S. military for the M16 rifle, it can also be used with the M4 carbine as well as many other assault rifles, carbines and combat shotguns. It can be used as a fighting knife and utility tool. It was introduced in 1964, when the M16 rifle entered service during the Vietnam War.

The M9 Bayonet, officially known as the M9 Phrobis III, is a multi-purpose knife and bayonet officially adopted in 1986 by the United States. It has a 7-inch (18 cm) blade and is issued with a sheath designed to double as a wire cutter.