The 3OF34 is a Soviet-era 120 mm high-explosive fragmentation mortar bomb normally stencilled as OF34, fitted with an M-12 impact-and-delay fuze, and catalogued in both PM-43 and 2B11 ammunition tables. Open references also record the round as 3VOF53 in the PM-43 table and 3VOF68 in the 2B11 table, with a 16.1 kg mass and 3.43 kg explosive fill.
The 3OF34 appears in Soviet and Russian 120 mm mortar ammunition tables as a standard HE-frag mortar bomb for the PM-43 and 2B11 mortar families.
| Firing weapon | Weapon type | Firing evidence |
|---|---|---|
 | 120 mm heavy mortar | The PM-43 ammunition table lists 3VOF53 / 3OF34 as a 16.1 kg HE-frag round with 3.43 kg of explosive fill and a 5.7 km maximum range. Sources: 120-PM-43 Mortar Ammunition Table |
 | 120 mm heavy mortar system | The 2B11 ammunition table lists 3VOF68 / 3OF34 as a 16.1 kg HE-frag round with 3.43 kg of explosive fill and a 7.1 km maximum range for the 2S12 Sani family. Sources: 2B11 Ammunition Table |
Fenix Insight describes 3OF34 as a Soviet-era-developed 120 mm HE-frag mortar bomb, normally stencilled OF34, and says it is fitted with the M-12 impact-and-delay fuze. The same record also notes the codename Nel'ma.
| Marking | Meaning |
|---|---|
| OF34 / 3OF34 | Short stencil and full index for the bomb |
| Nel'ma | Reported codename |
| M-12 | Impact and delay fuze model |
The PM-43 mortar family entered Soviet service in 1943; its ammunition table later lists 3VOF53 / 3OF34 as a standard HE-frag round.
Sources: 120-PM-43 Mortar Ammunition Table
The 2B11 entered Soviet service in 1981, and its ammunition table lists 3VOF68 / 3OF34 with a 7.1 km maximum range.
Sources: 2B11 Ammunition Table
