The RGO-78 is a Bulgarian-developed defensive fragmentation hand grenade introduced in 1978. It was designed as a domestic improvement on the Soviet RGD-5 lineage, incorporating a preformed fragmentation body and the DVM-78 fuse. The Bulgarian Armed Forces adopted the grenade.
The defensive designation indicates an effective fragment radius larger than the standard throw distance, requiring use from covered positions – consistent with the tactical role of the Soviet F-1 that it complements at the domestic level. The DVM-78 fuse is shared with the RGN-86, standardizing the fuze component across both types.
Available for institutional procurement by ministries of defence, authorized defence contractors, and licensed importers. Inquiries must include product designation, required quantity, country of final destination, intended end-use declaration, and applicable end-user certificate (EUC) or import authorization.