| 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.[1] 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.
- ^ Army War College, "Grenade Training Manual"