M9 bayonet

The M9 Bayonet 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.

M9 bayonet
Class Manportable
Type Knives
Manufacturer Buck Knives
Origin United States of America
Country Name Origin Year
United States of America 1986
Country Name Operational Year Retirement Year
United States of America 1986 View
ManufacturerName Production From Production To Quantity
Buck Knives 1986 405000 View

The M9 bayonet was designed and developed by Charles A. "Mickey" Finn at his R&D company, Qual-A-Tec. It is a refined copy of the Russian AKM Type I bayonet. He later produced it under the Phrobis III name, filling a military contract for 325,000 units. Buck Knives was contracted to make 300,000 units and sold a commercial version under their own name. Finn's designs proved extremely popular, and were widely counterfeited and sold illegally by other makers. In 1986, Finn received U.S. Patent 4,622,707, however they continued to flow unchecked into the United States from Asia and Mexico, cutting into legitimate sales.

After the Phrobis III bayonet contract was completed, rights to the M9 reverted to the United States Army and there were many subsequent versions from other companies. It is issued by the armed forces of the U.S. and other countries, and has also been sold commercially in various versions.

Some production runs of the M9 have a fuller and some do not, depending upon which contractor manufactured that batch and what the military specs were at the time. The M9 Bayonet partially replaced the older M7 Bayonet, introduced in 1964. Although it has been claimed that the M9 may be more prone to breakage than the older M7, the M9 bayonet has a 20% thicker blade and tang (0.235" vs. 0.195") and a 75% greater cross-sectional area of steel in the blade than the M7.

Type Bayonet
Place of origin San Diego, California, United States
Service history
In service 1986–present
Wars Persian Gulf War
Invasion of Panama
War in Afghanistan
Iraq War
Production history
Designer Charles A. "Mickey" Finn
Designed 1986
Manufacturer Phrobis, Buck Knives, LanCay, and Ontario
Produced 1986–present
Number built 405,000+
Length 12 in (30 cm)
Blade length 7 in (18 cm)
Blade type Clip Point

End notes