M4 bayonet
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The M4 bayonet was introduced in 1944 for use with the
M1 carbine The M1 carbine (formally the United States Carbine, Caliber .30, M1) is a lightweight semi-automatic carbine that was a standard firearm for the U.S. military during World War II, the Korean War and the Vietnam War. The M1 carbine was produced ...
. It was built on the
M3 fighting knife The M3 trench knife or M3 fighting knife was an American military combat knife first issued in March 1943. The M3 was originally designated for issue to soldiers not otherwise equipped with a bayonet.Trzaska, Frank, (1996), U.S. Fighting Knives ...
.


Description

The M4 bayonet, like the M3 fighting knife that preceded it, was designed for rapid production using a minimum of strategic metals and machine processes, it used a relatively narrow 6.75-inch bayonet-style spear-point blade with a sharpened 3.5-inch secondary edge. The blade was made of carbon steel, and was either blued or parkerized. Production of the grooved wooden handle was later simplified by forming the grip of stacked leather washers that were shaped by turning on a lathe, then polished and lacquered. The steel crossguard had a bayonet muzzle ring and the bayonet fastener is on the pommel. Later models used a black molded plastic handle. The basic design would be used for the later M5, M6 and
M7 bayonet The M7 bayonet (NSN 1095-00-017-9701) 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 knif ...
s.


M8 and M8A1 Scabbard

There are two variations of this scabbard, both with an olive drab fiberglass body with steel throat. The early version M8 scabbard only had a belt loop and lacked the double hook that earlier bayonet scabbards had for attaching to load carrying equipment such as the M1910 Haversack. The improved M8A1 scabbard manufactured later in WW II has the M1910 bent wire hook. The scabbard throat flange is stamped "US M8" or "US M8A1" on the flat steel part along with manufacturer initials. Some M8 scabbards were later modified by adding the M1910 hook. Later M8A1 scabbards were manufactured with a modified extended tab on the web hanger to provide more clearance for the M5 bayonet which rubbed against the wider bayonet handle. This sheath is correct for all post-war US bayonets including the M4, M5, M6, and M7. It was also used with the M3 fighting knife.


See also

*
M3 fighting knife The M3 trench knife or M3 fighting knife was an American military combat knife first issued in March 1943. The M3 was originally designated for issue to soldiers not otherwise equipped with a bayonet.Trzaska, Frank, (1996), U.S. Fighting Knives ...
* M5 bayonet used by the
M1 Garand The M1 Garand or M1 rifleOfficially designated as U.S. rifle, caliber .30, M1, later simply called Rifle, Caliber .30, M1, also called US Rifle, Cal. .30, M1 is a semi-automatic rifle that was the service rifle of the U.S Army during World W ...
* M6 bayonet used by the
M14 rifle The M14 rifle, officially the United States Rifle, Caliber 7.62 mm, M14, is an American selective fire battle rifle chambered for the 7.62×51mm NATO (.308 in) cartridge. It became the standard-issue rifle for the U.S. military in 1959, r ...
*
M7 bayonet The M7 bayonet (NSN 1095-00-017-9701) 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 knif ...
used by the
M16 rifle The M16 rifle (officially designated Rifle, Caliber 5.56 mm, M16) is a family of military rifles adapted from the ArmaLite AR-15 rifle for the United States military. The original M16 rifle was a 5.56×45mm automatic rifle with a 20-r ...
*
M9 bayonet 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 blade and is issued with a sheath designed to double as a wire cutter. History The M9 bayon ...


References

{{Reflist, 30em Bayonets of the United States World War II infantry weapons of the United States Infantry weapons of the Cold War Weapons and ammunition introduced in 1944