Guard

The quadrupedal GS-54 Guard is among the most well-known SecurityMech designs, named alongside the likes of the Copper, Pacifier and Inquisitor. It is not spelled out if the Guard is built to BattleMech specifications or as an IndustrialMech, although context and it being listed among "commercial-grade" SecurityMechs suggests the latter. Exact stats for the Guard have not been published so far.

The Guard should not be confused with the (apocryphal) Guardian which is also a machine gun-toting 15-ton SecurityMech (albeit one expressly built as a BattleMech).

The Guard is chiefly used on heavily populated worlds in the Capellan Confederation. In 3028 the design was also found among the Draconis Combine's Civilian Guidance Corps PoliceMech forces on An Ting, suggesting the Confederation had exported the design to the Combine at least.

Described as an "awkward quadruped monstrosity of questionable Capellan workmanship" but also as "fairly nimble" and "surprisingly swift on its four legs", a Guard was shown to be capable of preventing a Griffin from closing with it in the confines of a city using lateral movement.

Weapons and Equipment
The Guard is armed with twin machine guns. No other weaponry is mentioned, though it is overall described as "weakly armed and armored".

An ambiguous scene features a pilot ejecting from a SecurityMech that may or may not have been a Guard from the context; this is noteworthy insofar as ejection seats are automatically included on BattleMechs but are an extra piece of equipment on IndustrialMechs.