AMOS is a Finnish-Swedish twin-barrel 120 mm breech-loading mortar turret developed for protected wheeled, tracked, and naval platforms. Public sources document Finnish Army XA-361 AMOS vehicles, CV90 and naval prototype work, rapid shoot-and-scoot fire missions, MRSI firing, and a single-barrel Patria Nemo follow-on, but no directly sourced AMOS combat-use row was found for a named conflict.
Public sources describe AMOS as the twin-barrel system and Nemo as a lighter single-barrel follow-on; Swedish prototype work used the SSG120 designation.
| Variant | Configuration | Designation notes |
|---|---|---|
| AMOS TD | Technology demonstrator | Patria says AMOS TD followed the addition of fire control and semi-automatic loading in 1997. Sources: Nemo hits by surprise |
| XA-361 AMOS | Finnish Army AMV-mounted mortar vehicle | Patria and Finnish Defence Forces sources identify the Finnish AMOS vehicle as an XA-361 AMV 8x8 mortar carrier. Sources: Nemo hits by surprise, Armoured Mortar Vehicle XA-361-AMOS |
| Naval AMOS demonstrator | Shipboard test configuration | Patria says AMOS was tested in Sweden on a Stridsbåt 90 boat and could fire on the move, though the twin-barrel turret's weight limited smaller-vessel carriage. Sources: Nemo hits by surprise |
| Patria Nemo | Single-barrel follow-on | Patria describes Nemo as the lighter single-barrel development path that followed AMOS. Sources: Nemo hits by surprise, Armament |
AMOS was developed for multiple armored carriers; one documented tracked prototype path used the CV90 family.
| Compatible item | Item type | Compatibility evidence |
|---|---|---|
 | Tracked armored vehicle platform | Defense Update reported that Swedish prototype AMOS systems ordered from BAE Systems Hägglunds were to be based on CV90 platforms, while earlier AMOS development also referenced tracked CV90 and wheeled Pasi/AMV carriers. Sources: Advanced Mortar System (AMOS) |
AMOS is treated here as a relationship-only artillery system because public sources support procurement, prototypes, training display, and non-use boundaries, but not a direct AMOS combat-use row for a named conflict. The record therefore links platform and family context without copying conflicts from Finnish Army service or from related mortar ammunition.
Patria announced 18 AMOS mortar vehicles for the Finnish Army, and the Finnish Defence Forces identify the XA-361 AMOS as a readiness-brigade mortar system introduced in 2013.
Sources: Patria Hägglunds to deliver AMOS mortar vehicles to the Finnish Army; Armoured Mortar Vehicle XA-361-AMOS.
Patria describes a vehicle-mounted turreted mortar able to receive target data, traverse through 360 degrees, leave a firing position quickly, and use MRSI fire-control methods.
Source: Nemo hits by surprise.
A Patria 2011 Libya statement rejected allegations involving AMOS or Nemo, and no source checked during this pass directly documented AMOS fielding in a named armed conflict.
Source: Patria's mortar systems have not been used to fire cluster ammunition in Libya.
Patria says the collaboration with Swedish Hägglunds began in 1995, with Patria responsible for weapon development and Hägglunds responsible for the turret and auxiliary systems.
Sources: Nemo hits by surprise
Patria says AMOS TD emerged after fire control and semi-automatic loading were added to the turret-mounted breech-loading mortar system.
Sources: Nemo hits by surprise
Defense Update reported a Swedish FMV contract for two CV90-based AMOS prototype systems from BAE Systems Hägglunds.
Sources: Advanced Mortar System (AMOS)
Patria announced that Patria Hägglunds would deliver 18 AMOS mortar vehicles to the Finnish Army, with fielding planned for 2013.
Sources: Patria Hägglunds to deliver AMOS mortar vehicles to the Finnish Army
Patria rejected claims that AMOS or Nemo systems were used by parties in Libya and stated that no AMOS systems had been produced under the AAI licensing agreement.
Sources: Patria's mortar systems have not been used to fire cluster ammunition in Libya
The Finnish Defence Forces equipment page says AMOS entered Finnish Defence Forces service in 2013 for readiness-brigade mortar use.
Sources: Armoured Mortar Vehicle XA-361-AMOS
