A direct successor to the OZ-06MS Leo, the MMS-01 Serpent was designed with the intention of being usable both on Earth and in space without having to switch equipment, as the importance of space combat became much more apparent after the appearance of the Operation Meteor Gundams. The only fixed armament of the Serpent were a pair of shoulder-mounted 8-tube missile launchers. The suit could also carry a variety of hand weapons, including a bazooka, a beam cannon, and a double Gatling gun similar to the ones carried by the XXXG-01H2 Gundam Heavyarms Custom. However, the Serpent lacked any close combat weapons, putting it at a disadvantage if any enemy was able to come into close proximity. Defense wise, the Serpent was built using an alloy known as Neo-Titanium, a material that is half the weight and twice as strong as conventional Titanium alloys. The Serpent's cockpit is identical to the Leo's aside from enhanced targeting and lock-on systems, allowing its pilot to better make use of the suit's weapons.