Mk 1 grenade
| Mk 1 grenade | |
|---|---|
The Mk 1 grenade | |
| Type | Time-fused grenade |
| Place of origin | United States |
| Service history | |
| In service | 1917–1918 |
| Used by | United States |
| Wars | World War I |
| Production history | |
| Designed | 1917 |
| Produced | 1917–1918 |
| Specifications | |
Detonation mechanism | Timed friction fuse |
The Mk 1 grenade (sometimes spelled Mk I) is a fragmentation hand grenade used by American forces during World War I. 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 used through World War II.