OFG-7 High-Explosive Fragmentation Projectile for RPG-7
1. Overview
The OFG-7 (Oskolochno-Fugasnaya Granata – Fragmentation-High Explosive Grenade) is a Soviet/Russian dual-purpose high-explosive fragmentation projectile designed for the RPG-7 series of shoulder-fired rocket-propelled grenade launchers. Combining both blast and fragmentation effects, the OFG-7 provides infantry units with enhanced lethality against personnel, light fortifications, and unarmored materiel. The “OF” designation indicates its combined fragmentation and high-explosive characteristics, distinguishing it from purely fragmentation-focused variants in the OG-7 family.
2. Country/Bloc of Origin
- Country: Soviet Union / Russian Federation
- Development Period: Late Soviet era through Russian Federation modernization programs
- Primary Manufacturers: Bazalt, various Russian defense enterprises under Tecmash
- Production Status: Current production item
- International Distribution: Exported globally alongside RPG-7 systems; encountered worldwide in conflict zones
3. Ordnance Class
- Type: Rocket-propelled grenade (RPG) projectile
- Primary Role: Anti-personnel / Anti-materiel dual-purpose round
- Delivery Method: Shoulder-fired from RPG-7 family launchers
- Category: High-Explosive Fragmentation (HE-FRAG / FRAG-HE)
- Effect Classification: Combined blast and fragmentation
4. Ordnance Family / Nomenclature
- Official Designation: OFG-7 (ОФГ-7 in Cyrillic)
- Alternative Designations: OFG-7V (variant designations)
- Launcher Compatibility: RPG-7, RPG-7V, RPG-7V2, RPG-7D, RPG-7D3
- Related Variants:
- OG-7 (baseline fragmentation round)
- OG-7E (enhanced fragmentation)
- GHEF-7MA (modernized HE-FRAG)
- NATO Reporting: Cataloged under Soviet/Russian RPG-7 ammunition family
- Nomenclature Note: “OF” prefix indicates Oskolochno-Fugasnaya (Fragmentation-High Explosive) dual-purpose design
5. Hazards
Primary Hazards:
- Blast Effect: High-explosive detonation produces significant overpressure
- Fragmentation: Steel body generates lethal fragments upon detonation
- Combined Lethality: Dual-effect design maximizes casualty potential
- Rocket Motor: Solid propellant presents fire and detonation hazards
Sensitivity Considerations:
- Impact-sensitive piezoelectric fuze activates upon target strike
- Propellant susceptible to cookoff when exposed to fire
- Aged or degraded specimens may exhibit unpredictable fuze behavior
- Mechanical shock to fuze assembly poses detonation risk
Danger Areas:
- Lethal radius (combined effects): 15-25 meters
- Casualty-producing radius: 50+ meters (fragmentation dependent on terrain)
- Minimum safe engagement distance: 20-30 meters (operator safety)
- Backblast danger area: 20-30 meters in 90-degree cone behind launcher
UXO Considerations:
- Unfired rounds retain full explosive and propellant charges
- Impact failures create armed but unexploded hazards
- Fuze may remain in sensitive armed state after failed detonation
- Corrosion and environmental exposure increase handling risks
- Treat all OFG-7 UXO as armed and extremely dangerous
6. Key Identification Features
Dimensions:
- Overall Length: Approximately 680-720 mm (complete round with motor)
- Warhead Diameter: 70-73 mm
- Weight (Complete Round): Approximately 2.0-2.4 kg
Physical Characteristics:
- Ogival (pointed) nose profile with impact fuze at tip
- Steel warhead body designed for fragmentation
- Visible pre-formed fragmentation pattern (grooves or serrations) on body
- Standard RPG-7 sustainer motor assembly
- Folding stabilizer fins on motor section
- Booster charge connecting warhead to motor
Color and Markings:
- Warhead body typically olive drab or dark green
- Yellow bands or markings indicating high-explosive content
- White or yellow stenciled designations: “OFG-7” or Cyrillic equivalent
- Lot number, production date, and factory codes
- May feature red markings indicating explosive fill
Distinctive Features:
- Fragmentation grooves or serrations visible on warhead body
- Pointed nose distinguishes from bulbous shaped-charge anti-tank rounds
- Similar profile to OG-7 but may show different fragmentation sleeve design
- Weight intermediate between light fragmentation and heavy thermobaric rounds
7. Fuzing Mechanisms
Primary Fuze:
- Type: Point-detonating (PD) piezoelectric impact fuze
- Model: VP-7M or equivalent piezo fuze
Detonation Sequence:
- Impact with target crushes piezoelectric element
- Piezoelectric pulse initiates electric detonator
- Detonator fires booster charge
- Booster detonates main explosive fill
- Warhead body fragments and accelerates outward with blast wave
Arming Sequence:
- Projectile exits RPG-7 launch tube
- Setback forces during launch release mechanical safety
- Sustainer motor ignites at safe distance (10-20 meters)
- Spin or flight dynamics complete fuze arming
- Fuze fully armed and sensitive to impact after safe distance
Safety Mechanisms:
- Setback safety prevents fuze arming until launch acceleration occurs
- Bore safety feature prevents in-tube detonation
- Arming delay ensures minimum safe distance before sensitivity
- Mechanical barriers separate detonator from booster until armed
Self-Destruct Feature:
- Some variants incorporate pyrotechnic self-destruct element
- Activates after predetermined flight time (typically 4-6 seconds)
- Destroys projectile in flight if no impact occurs
- Reduces UXO hazard from overshots
8. History of Development and Use
Development Background: The OFG-7 emerged from Soviet military requirements to expand the RPG-7’s tactical versatility beyond anti-armor engagements. While the PG-7 family of shaped-charge rounds proved devastatingly effective against armored vehicles, combat experience demonstrated the need for optimized anti-personnel capability. The OFG-7’s dual-purpose design combined significant blast effects with lethal fragmentation, making it effective against both exposed infantry and light field fortifications.
Design Philosophy: Unlike purely fragmentation-focused rounds (OG-7), the OFG-7 incorporates enhanced explosive fill to provide meaningful blast overpressure in addition to fragment spray. This makes the round effective against targets in defilade or light cover that might survive fragmentation alone.
Evolutionary Context:
- 1960s-1970s: RPG-7 enters service; anti-tank rounds dominate inventory
- 1970s-1980s: OG-7 fragmentation rounds developed for anti-personnel role
- 1980s-1990s: OFG-7 dual-purpose variant provides enhanced versatility
- 2000s-present: Continued production and refinement
Combat Employment: The OFG-7 has seen extensive use across numerous conflicts:
- Soviet-Afghan War (1979-1989)
- Chechen Conflicts (1990s-2000s)
- Iraqi insurgency and Syrian Civil War
- African and Middle Eastern conflicts involving Soviet/Russian equipment
- Current conflicts in Eastern Europe
Tactical Impact: The OFG-7 filled a capability gap between pure fragmentation rounds and specialized thermobaric ammunition. Its dual-purpose nature allows engagement of diverse targets without requiring ammunition changes, though dedicated rounds remain more effective against specific target types.
Current Status:
- Active production in Russian Federation
- Standard inventory item for Russian military
- Widely exported and encountered globally
- Remains current-generation equipment alongside newer variants
9. Technical Specifications
| Specification | Value |
|---|---|
| Caliber | 40 mm (launch tube) / 70-73 mm (warhead) |
| Overall Length | ~680-720 mm |
| Weight (Complete) | ~2.0-2.4 kg |
| Warhead Weight | ~1.0-1.2 kg |
| Muzzle Velocity | 115-120 m/s |
| Maximum Velocity | ~290-300 m/s (with sustainer) |
| Effective Range | 200-400 meters (point targets) |
| Maximum Range | 700-1000 meters |
| Explosive Type | TNT, Composition A, or equivalent |
| Explosive Weight | ~250-350 grams |
| Fragment Count | Approximately 1000-1500 fragments |
| Fragment Velocity | ~1500-2000 m/s initial |
| Lethal Radius | 15-25 meters |
| Casualty Radius | 50+ meters |
10. Frequently Asked Questions
Q: What distinguishes the OFG-7 from the OG-7 in terms of terminal effects? A: The OFG-7 features enhanced explosive fill designed to produce significant blast overpressure in addition to fragmentation. While the OG-7 prioritizes fragment production and dispersion, the OFG-7’s “OF” (Oskolochno-Fugasnaya/Fragmentation-High Explosive) design balances both effects. This makes the OFG-7 more effective against targets in light cover or shallow defilade where blast effects can reach around obstacles.
Q: How does the OFG-7’s effectiveness compare against different target types? A: Against exposed personnel, both OFG-7 and OG-7 are highly effective. The OFG-7 gains advantage against targets with partial cover (behind walls, in fighting positions) where blast effects complement fragmentation. Against light structures, the OFG-7’s enhanced blast can cause structural damage while fragments eliminate personnel. For hardened positions, dedicated thermobaric rounds (GTB-7S) remain superior.
Q: Can operators visually distinguish OFG-7 from OG-7 rounds in the field? A: Positive identification requires examining stenciled markings on the warhead body. The “OFG” designation distinguishes from “OG” variants. Physical differences may be subtle—similar diameters and profiles—though warhead construction details may vary. In practice, marking verification is the reliable identification method, and close examination should only be conducted by qualified personnel.
Q: What factors influence the OFG-7’s fragmentation pattern? A: Fragment dispersion is influenced by warhead body construction (pre-formed grooves vs. natural fragmentation), detonation symmetry, impact angle, and terminal velocity. Pre-formed fragmentation sleeves produce more uniform fragment sizes and patterns. Environmental factors (terrain, structures) also affect how fragments propagate after detonation.
Q: How does the OFG-7 perform against light armored vehicles? A: The OFG-7 is not designed for armor penetration and lacks shaped-charge capability. Against truly armored targets, it provides negligible penetration. However, fragments and blast can damage external components, optics, antennas, and exposed crew. It may disable thin-skinned vehicles (trucks, unarmored transports) but should not be relied upon against any vehicle with actual armor protection.
Q: What minimum safe distance should operators maintain when employing the OFG-7? A: Standard minimum safe engagement distance is 20-30 meters to protect the operator from their own fragmentation effects. The backblast danger zone (20-30 meters behind the launcher in a 90-degree cone) must also be clear. When engaging targets near friendly positions, fragment travel distance (50+ meters) must be considered.
Q: How do UXO responders prioritize the OFG-7 compared to other RPG-7 variants? A: All RPG-7 UXO is high priority due to sensitive fuzing and significant explosive content. The OFG-7’s enhanced explosive fill makes it potentially more hazardous than lighter fragmentation rounds. However, thermobaric rounds (GTB-7S) and large anti-tank rounds may receive higher priority due to greater explosive content or specialized fills. All RPG-7 UXO requires qualified EOD response.
Q: Does the OFG-7 incorporate any anti-handling features? A: Standard OFG-7 rounds do not incorporate intentional anti-handling mechanisms. However, the impact-sensitive piezoelectric fuze can be activated by rough handling, dropping, or mechanical shock to armed rounds. UXO that has experienced impact may be in a partially initiated state, making any movement extremely dangerous. Assume all OFG-7 UXO is booby-trap sensitive regardless of intentional design features.
This material is for educational and training purposes only. All ordnance items should be treated as dangerous until rendered safe by qualified EOD personnel. Never handle, move, or attempt to disarm any suspected explosive ordnance.