The M931 Full Range Practice Cartridge, DODIC CA09, is a U.S. 120 mm training mortar round for M120A1 and M121 battalion mortar systems. Army portfolio material describes it as ballistically similar in size, shape, and weight to M934A1 and M933A1 high-explosive cartridges, while the M781 practice fuze gives flash, bang, and smoke on impact for mortar-crew training.
Army portfolio material identifies the M931 as a full-range practice round for the M120A1 and M121 battalion mortar systems.
| Firing weapon | Weapon type | Firing evidence |
|---|---|---|
 | 120 mm mortar family | The Army portfolio book says the M931 is a full-range practice round for use in the M120A1 and M121 Battalion Mortar Systems, with ballistics similar to the M934A1 and M933A1 high-explosive cartridges. Sources: PEO Ammunition 2017 Portfolio Book |
The useful public context for the M931 is its training role beside combat 120 mm mortar cartridges, not an independent conflict-use record.
| Scope | Source-backed context | Catalog treatment |
|---|---|---|
| Designation | EPA AP-42 material lists DODIC CA09 for the M931 120 mm Full Range Practice Cartridge, while older FAS material uses the XM931 full-range training cartridge wording. | Aliases preserve CA09, FRPC, FRTR, and XM931 FRTC search terms for the same cartridge family. |
| Training effect | FAS and Army portfolio material describe the round as ballistically similar to high-explosive 120 mm cartridges, with the M781 practice fuze producing flash, bang, and smoke feedback. | The summary and specifications emphasize training realism rather than explosive battlefield effect. |
| Firing systems | Army portfolio material identifies M120A1 and M121 battalion mortar systems as the cartridge's firing systems. | The relationship section links the compatible 120 mm mortar family without copying mortar-system conflict rows onto the practice cartridge. |
| Conflict-use limit | Public sources found for this entry describe range training, production, compatibility, and images rather than direct use of the M931 cartridge in a named conflict. | The cartridge remains relationship-only until a direct source identifies M931 use, transfer, firing, or fielding in a specific conflict. |
Sources: PEO Ammunition 2017 Portfolio Book; EPA AP-42 CA09 M931 entry; XM931 120mm Full Range Training Cartridge; General Dynamics mortar munitions.
FAS reference material lists the XM931 full-range training cartridge as type classified standard in August 1996.
Army portfolio material gives January 1999 as the M931 material-release date.
DVIDS imagery from African Lion 2024 shows New York Army National Guard mortar training with an M931 120 mm far-range training round.
