RGO hand grenade

The RGO hand grenade (Russian: Ручная Граната Оборонительная, romanized: Ruchnaya Granata Oboronitel'naya, lit. 'Hand Grenade Defensive') is a defensive Soviet fragmentation hand grenade introduced mid 1980s alongside the RGN during the Soviet–Afghan War to replace the earlier F-1, RG-42, and RGD-5 hand grenades, which proved to be inadequate in the mountains of Afghanistan.