The MS-14F Gelgoog Marine is a variant of the A-type Gelgoog that was designed to be an overall more-effective mobile suit, while reducing production cost at the same time.To make the Gelgoog Marine maneuverable, numerous thrusters and extra propellant tanks were added to the suit. In order to cut costs, the Gelgoog's large Zulu-like shield was replaced with a "knuckle shield", modified from a Zaku II shoulder shield. The Gelgoog Marine could also carry a 90mm machine gun instead of a beam rifle. Being of the Close range type class, The Gelgoog Marine is considered to be a rival unit to the GM Guards Type due to the fact that the Gelgoog Marine's Speed and Melee combos are slightly better while the GM Guards Type is made for more of a defensive role. As a Gelgoog, The Gelgoog Marine has a full three hit melee combo compared to the Gelgoog Commander's two melee hits and the Mass-produced Gelgoog's One melee hit. However, Due to the removal of some of the armor and the shield being changed from it's usual Zulu-like shield to the Zaku "Knuckle" Shield, It has lost some of it's defence for that speed and lost the ability to tank damage with it's shield.