Mk2 Fragmentation Grenade

Type: Fragmentation Grenade

Nations: United States, Philippines, South Vietnam, South Korea, Israel +

Branch: Armed Forces

Time Period: 1920-1970s

Conflicts: WWII, Korean War, Vietnam War, Gulf War, Global War on Terrorism +

Other Names: Pineapple Grenade, Frag

Caliber: TNT High Explosive

Facts: The Mk2 Fragmentation grenade was developed in 1917 to replace the MkI grenade. The grenade was formally adopted in 1920 and served as the primary hand grenade with US troops until the 1960s. The ridged shape of the grenade shell allowed it to create fragments and shrapnel when detonated. Until 1943, high explosive ordinance, including grenades were painted bright yellow. The bright yellow paint made the grenades highly visible in the deep green jungles of Guadalcanal and in the dusty deserts of North Africa so in late 1943 the US ordinance department declared that fragmentation grenades be painted olive drab. A yellow band at the neck of the grenade still allows for it to be indicated as high explosive without being as visible. Large amounts of Mk2 grenades were produced during WWII. After WWII and after the development of the M26 grenade, Mk2 grenades were still being issued but in limited amounts to troops all the way up to the 1970s due to the vast stockpiles. The grenades can still be found today as surplus ordinance with other countries.