The progression of the Gecko led to the Urban Pacification Frame mk9c, "Salamnder." Unlike the Gecko, the Salamander is a ranged combat unit. The Salamander is often deployed where a show of force is necessary, as it is much more imposing than the Gecko.
Quoting David Roberts
Pacification? I think that that big gun will make quite big holes in things! I love how this tiny mech towers over the micro figures in the scene. They all look like they're waiting for something...
Haha, maybe just the fear will pacify those troublemakers? I think they're withing for Steve to get back with the donuts!