The Mk 1 grenade (sometimes spelled Mk I) is a fragmentation
hand grenade
A grenade is an explosive weapon typically thrown by hand (also called hand grenade), but can also refer to a shell (explosive projectile) shot from the muzzle of a rifle (as a rifle grenade) or a grenade launcher. A modern hand grenade genera ...
used by American forces during
World War I
World War I (28 July 1914 11 November 1918), often abbreviated as WWI, was one of the deadliest global conflicts in history. Belligerents included much of Europe, the Russian Empire, the United States, and the Ottoman Empire, with fightin ...
. According to its designers, it was to be the "simplest", yet most "fool-proof", grenade ever made. However, some major problems appeared when the grenade was used in the field. It was retired from service before the war ended, replaced in 1918 with the improved
Mk 2 grenade
The Mk 2 grenade (initially known as the Mk II) is a fragmentation-type anti-personnel hand grenade introduced by the U.S. armed forces in 1918. It was the standard issue anti-personnel grenade used during World War II, and also saw limited serv ...
used through
World War II
World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposin ...
.
Overview
The MK 1 is a time-fused fragmentation grenade and has 32 serrations on it. To start the fuse, the user has to pull the safety pin, then push off the cap on top of the grenade. Right before throwing, the user has to move the switch on the lever away from the grenade in order to start the fuse.
History
When American forces entered World War I, they lacked a fragmentation grenade of their own. American forces often received either the
Mills bomb
"Mills bomb" is the popular name for a series of British hand grenades which were designed by William Mills. They were the first modern fragmentation grenades used by the British Army and saw widespread use in the First and Second World Wars. ...
or the
French F1 grenade. When it came time to make a grenade, American designers looked to the F1 grenade for inspiration. In 1917, the Mk 1 grenade was created.
However, it became apparent that the Mk 1 grenade was quite difficult to use in the field. The grenades were often not ignited properly before being thrown, and enemies would return the grenade, this time properly lit.
[http://www.inert-ord.net/usa03a/usa1/mk1sp/index.html] The MK 1 was immediately recalled and production stopped. It was replaced in 1918 with the improved
Mk 2 grenade
The Mk 2 grenade (initially known as the Mk II) is a fragmentation-type anti-personnel hand grenade introduced by the U.S. armed forces in 1918. It was the standard issue anti-personnel grenade used during World War II, and also saw limited serv ...
used through
World War II
World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposin ...
.
Variants
Mk. IA1
The Mk. IA1 was an inert cast-iron training grenade. It has a simulated fuze with a removable pin and safety lever. They were manufactured for a brief time during World War I to train troops on how to initiate and throw the Mk. I and Mk. II fragmentation grenades. Early in the United States’ entry into
World War II
World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposin ...
, a number were produced as training aids in 1942.
Its markings consist of a black body with a narrow white band around the top.
References
External links
More Mk 1 grenade pictures and a picture of the training model{{WWIUSInfWeaponsNav
World War I infantry weapons of the United States
Hand grenades of the United States
Fragmentation grenades
Weapons of the Philippine Army