The Colonial Legionnaire Corps commonly makes use of infantry-portable support weapon teams alongside deployments of regular troops. Every Legionnaire is trained to use these weapons, and many secretly hope for a rotation to support duty where they can rain down destruction far from the wet-work of CQB. The firepower gained is far in excess of what their assault rifles can do, and despite losing their most effective tool in CQB engagements most troopers willingly make the exchange.
The UM-103 Standard Infantry Mortar is a versatile weapon, most dangerous when used in groups where they can rain down an unstoppable barrage of munitions from on high. It requires a crew of 2 to operate and can fire explosive cluster rounds or concussion rounds.
Rules and Background for this unit can be found in Reconquest: Phase 2