Singapore
- M113A2 Ultra IFV - Originally an M113A1, upgraded to A2 standard and modernized by ST Kinetics with cupola mounted 40mm AGL/0.5-inch HMG twin weapon station, or the Rafael Overhead Weapon Station with M242 Bushmaster 25 mm caliber cannons plus improved armor. Used by the Singapore Army.
- M113A2 Ultra Mechanised Igla - same as the above but armed with 4 ready to fire Igla SAMs and are configured for the role of short range air defense (SHORAD). The Integrated fire unit (IFU) is equipped with an advance fire control radar while the Weapon fire unit (WFU) version is radarless but can be cued by the fire control radar of the former. Used by the Republic of Singapore Air Force (RSAF).
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The M113A2 Ultra - Mechanised Igla Integrated fire unit (IFU).
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RSAF M113A2 Ultra - Mechanised Igla Integrated fire unit (IFU). Note the mast mounted fire control radar.
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RSAF M113A2 Ultra - Mechanised Igla Weapon fire unit (WFU).
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Comparison of profile between Mechanised Igla IFU & WFU.
Read more about this topic: Variants Of The M113 Armored Personnel Carrier