Combine Mounted Gun
The weapon is transported in the back of a specialized Combine Prisoner Transport truck seated on a rotating platform and featuring a Force Field shield very similar to the kind used by the Combine Charger on the top of the weapon to protect the operator. It has a unique firing mechanism, consisting of a handle located on the left side of the weapon which acts as the trigger, firing the weapon when pulled toward the operator. Grenades which detonate on impact are fed into the weapon through a large box magazine and appear to be highly explosive. Alyx Vance uses one of these weapons to defeat a Strider in the chapter Breaking and Entering.