RGO hand grenade
The RGO hand grenade (Ruchnaya Granata Oboronitel'naya, ("Hand Grenade Defensive")) is a defensive Soviet fragmentation hand grenade. It consists of a double layered steel pre-fragmented body. It is very similar to the single-layered offensive aluminium-bodied RGN hand grenade. It uses the UDZS dual action fuze, which has both impact and time delay functions. The impact fuze arms after a pyrotechnic delay of 1 to 1.8 seconds. If the impact fuze has not triggered the grenade after 3.2 to 4.2 seconds a second pyrotechnic delay triggers the grenade. The fragments produced by the grenade generate a lethal radius of between 6 metres (20 ft) and 20 metres (66 ft), with the safety radius being 100 metres (330 ft).
| RGO hand grenade | |
|---|---|
RGO hand grenade | |
| Type | Hand grenade |
| Place of origin | Soviet Union |
| Specifications | |
| Mass | 520–530 g (18–19 oz) |
| Length | 114 mm (4.5 in) |
| Diameter | 60 mm (2.4 in) |
| Filling | A-IX-1 (96% RDX phlegmatized with 4% wax) |
| Filling weight | 90 g (3.2 oz) |
Detonation mechanism | UDZS Impact fuze arming after 1 to 1.8 seconds or time delay after 3.2 to 4.2 seconds. |
Unlike the two-part hemispherical RGN, the RGO is made up of 4 quadrants. One of the lower quadrants has a diamond-shaped cross-hatching in the outer shell. This is designed to help the operator to distinguish it by touch from the smooth-shelled RGN in low-light or dark conditions.