Profile
- Origin
- Singapore
- Built by
- ST Kinetics
- Type
- 120 mm extended-range smoke mortar round
- Service note
- 2010s-present
- Designer
- ST Engineering Land Systems
- Produced
- 2010s-present
Munitions
120 mm ER Infra-Red Red Phosphorous
Also known as
- 120 mm ER IR RP
- 120mm ER IR RP
- ER IR RP
- 120 mm extended-range infra-red red phosphorus
- 120 mm extended-range infrared red phosphorus
ST Engineering's 120 mm ER Infra-Red Red Phosphorous (IR RP) is an extended-range smoke and obscurant mortar round in the Singapore company's SRAMS ammunition context. Manufacturer material lists visual, infrared, and laser-spectrum screening effects from a three-canister payload, smooth-bore 120 mm mortar compatibility including vehicle-mounted systems, and a 650 m to 9 km range.
Profile / Specs
Specifications
- Caliber
- 120 mm
- Role
- Extended-range smoke and obscurant round
- Range
- 650 m to 9,000 m
- Weight
- 14.8 kg
- Length
- 807 mm
- Payload
- 3 smoke canisters
- Muzzle velocity
- 408 m/s
- Compatibility
- All smooth-bore mortar systems, including vehicle-mounted systems
- Fuze
- MTSQ DM93
Variants
Public ST Engineering and Janes material place the IR RP smoke round inside a broader ST Engineering 120 mm smooth-bore/SRAMS ammunition family rather than as a standalone weapon system.
| Variant | Configuration | Designation notes |
|---|---|---|
 | 120 mm extended-range high-explosive mortar round | Janes names Extended Range High Explosive in the SRAMS Mk II ammunition suite; it is the high-explosive extended-range sibling rather than the IR RP obscurant round. Sources: IDEX 2018: Singapore's ST Engineering launches SRAMS 120 mm Mk II |
 | 120 mm GPS-guided precision mortar bomb | Janes names PM120 in the same SRAMS Mk II ammunition-suite context; its role differs as a precision-guided mortar bomb rather than a screening munition. Sources: IDEX 2018: Singapore's ST Engineering launches SRAMS 120 mm Mk II |
Compatible Mortar Systems
ST Engineering says this ER mortar-bomb line is compatible with all smooth-bore mortar systems, including vehicle-mounted systems.
| Compatible item | Item type | Compatibility evidence |
|---|---|---|
 | 120 mm mortar carrier | ST Engineering says the ER mortar-bomb line is compatible with all smooth-bore mortar systems, including vehicle-mounted systems, and the Agrab mounts ST Kinetics' SRAMS mortar on an RG-31 vehicle. Sources: Mortar Bombs, Agrab mobile mortar overview |
Obscurant Role And Launcher Context
The public sources are strongest on the round's screening role, technical data, and launcher compatibility. They support a component-style ammunition page, not an independent conflict-use row for the exact IR RP round.
| Scope | Source-backed context | How to read this page |
|---|---|---|
| Screening effect | ST Engineering describes the round as an extended-range IR RP smoke mortar bomb for visual, infrared, and laser-spectrum screening. | The tags and type treat it as a smoke/obscurant munition rather than a high-explosive mortar bomb. |
| Round data | The SRAMS brochure lists a 120 mm round with three smoke canisters, MTSQ DM93 fuze, 408 m/s muzzle velocity, and a 650 m to 9 km range. | The specifications use the manufacturer table as the baseline for mass, length, payload, fuze, and range. |
| Launcher context | ST Engineering says the ER mortar-bomb line is compatible with smooth-bore mortar systems, including vehicle-mounted systems; the Agrab page documents a vehicle-mounted SRAMS carrier. | The relationship section links the compatible carrier context without copying the carrier's conflict record onto the ammunition. |
| Conflict-use limit | The available public sources identify the round and compatible systems but do not directly document this exact munition in a named conflict. | The record remains relationship-only until a source names the IR RP round itself in a conflict-use context. |
Sources: 120mm Extended Range Mortar Specifications; Mortar Bombs; 120mm Super Rapid Advanced Mortar System (SRAMS); Agrab mobile mortar overview.
Timeline
120 mm ER Infra-Red Red Phosphorous Key Events
SRAMS Mk II ammunition suite reported
Janes reported ST Engineering's SRAMS 120 mm Mk II launch and named ER Infra-Red Red Phosphorous (IR RP) among the ammunition-suite designations.
Sources: IDEX 2018: Singapore's ST Engineering launches SRAMS 120 mm Mk II
ER IR RP data listed in SRAMS brochure
ST Engineering's SRAMS brochure lists the 120 mm ER Infra-Red Red Phosphorous round with a 14.8 kg mass, 807 mm length, three smoke canisters, MTSQ DM93 fuze, and 650 m to 9 km range.
Sources: 120mm Extended Range Mortar Specifications
Media
120 mm ER Infra-Red Red Phosphorous Images
Related Weapon Systems
Sources
120mm Extended Range Mortar SpecificationsPublisher: ST Engineering | Note: Supports manufacturer background and the ER mortar-bomb specifications, including the ER Infra-Red Red Phosphorous designation, range, mass, fill, fuze, compatibility, and the brochure's technical data table. | Accessed: 2026-06-29Mortar BombsPublisher: ST Engineering | Note: Supports manufacturer background, the 120 mm ER mortar-bomb family, compatibility with smooth-bore mortar systems, and the official page image used for this record. | Accessed: 2026-06-29120mm Super Rapid Advanced Mortar System (SRAMS)Publisher: ST Engineering | Note: Supports the SRAMS launcher context, vehicle-mounted integration, and the official SRAMS image used in the gallery. | Accessed: 2026-06-29IDEX 2018: Singapore's ST Engineering launches SRAMS 120 mm Mk IIPublisher: Janes | Note: Supports the exact ER Infra-Red Red Phosphorous (IR RP) designation and the SRAMS Mk II ammunition-suite naming. | Accessed: 2026-06-29Agrab mobile mortar overviewPublisher: Military Periscope | Note: Supports the Agrab SRAMS mortar-carrier background used to ground the reciprocal compatibility link. | Accessed: 2026-06-29