RGO hand grenade

Hand grenade

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.

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)^[1]^[2] and 20 metres (66 ft),^[3] with the safety radius being 100 metres (330 ft).

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.

History

The RGN and RGO grenades were developed under Project BAZALT ("Basalt") during the Soviet–Afghan War to supplement the RGD-5. When in combat in the mountains Soviet troops found their grenades were less effective. The steep terrain often caused grenades to accidentally bounce or roll back towards the thrower's position and cause friendly casualties. The long fuse time allowed the enemy forces to get under cover.^[4]

The RGO's time delay fuze prevents friendly casualties if it impacts too soon or will air-burst over an enemy under cover if it hadn't impacted.^{[citation needed]} The impact fuze detonates when it hits any terrain – even sand, snow, or water.^[4]

The grenade is still in production in Russia and Ukraine and is in service with a number of countries.^[1]

References

^ ^a ^b Rottman, Gordon L. (20 February 2015). The Hand Grenade. Bloomsbury Publishing. pp. 31–32. ISBN 978-1-4728-0735-9.
^ McCullough, Jay (July 2010). Ultimate Guide to U.S. Army Combat Skills, Tactics, and Techniques. Skyhorse Publishing. ISBN 9781616080105.
^ "FM 3-23.30, Grenades and Pyrotechnic Signals" (PDF). bulletpicker.com. Department of the Army.
^ ^a ^b shtab, Russia (Federation) Generalʹnyĭ (2002). The Soviet-Afghan War: How a Superpower Fought and Lost. University Press of Kansas. pp. 40–41. ISBN 978-0-7006-1185-0. Retrieved 30 August 2023.