ola - mount ed ▁C IS ▁ 4 0 mm ▁A GL ▁( Autom atic ▁Gren ade ▁La unch er ) ▁and ▁C IS ▁ 0 . 5 - inch ▁H M G ▁( He avy ▁Machine ▁Gun ) ▁tw in - type ▁weapon ▁station ▁or ▁the ▁Isra eli ▁Rafael ▁Over head ▁We ap on ▁Station ▁with ▁the ▁US ▁M 2 4 2 ▁Bush master ▁ 2 5 ▁mm ▁cal iber ▁auto - c ann ons ▁plus ▁improved ▁arm our . ▁This ▁Singapore - up grad ed ▁M 1 1 3 ▁version ▁is ▁operated ▁by ▁the ▁Arm our ▁Form ation ▁of ▁the ▁Singapore ▁Army . ▁Today , ▁it ▁is ▁gradually ▁being ▁replaced ▁by ▁the ▁locally ▁designed ▁B ion ix ▁Infantry ▁Fight ing ▁Ve h icle ▁( IF V ) ▁as ▁well ▁as ▁the ▁Bron co ▁tw in - car riage ▁track ed ▁arm oured ▁personnel ▁car rier ▁( AP C ). ▁ ▁M 1 1 3 A 2 ▁Ult ra ▁Mechan ised ▁Ig la ▁- ▁Of ▁the ▁same ▁as ▁the ▁one ▁above , ▁but ▁armed ▁with ▁six ▁ready - to - fire ▁Soviet ▁Ig la ▁S AM s ▁( sur face - to - air ▁miss iles ) ▁and ▁configured ▁for ▁the ▁role ▁of ▁short - range ▁air ▁defense ▁( SH OR AD ). ▁The ▁Integr ated ▁Fire ▁Unit ▁( IF U ) ▁variant ▁is ▁equ ipped ▁with ▁an ▁advanced ▁fire - control ▁rad ar ▁to ▁assist ▁in ▁pin - point ing ▁the ▁location ▁of ▁enemy ▁aircraft ▁to ▁be ▁shot ▁down ▁whilst ▁the