The Mk. II may also arm a "clay bazooka" weapon, which is capable of disabling a mobile suit's mobility via an adhesive warhead (though it can equip normal explosive shells if desired). Aside from the aforementioned mundane enhancements, the Mk. II's most substantial contribution to mobile suit technology and largest upgrade over its predecessor is the then-revolutionary movable frame construction, which later inspired the designs in the novel Gundam Sentinel. Paradoxically, the Gundam Mk. II is not armored with the wonderfully durable Gundarium alloy material, first introduced in the series on the original RX-78 Gundam, making it no more or less physically durable than mass-production mobile suits of the era (the term Gundarium is a creation of the Zeta Gundam series; formerly, the same material was known as "Lunar Titanium" in Mobile Suit Gundam, and was renamed (or retconned from a meta standpoint) in honor of the original Gundam). Further development by the Titans was delayed indefinitely following a raid by the Anti Earth Union Group operatives (led by the incognito Zeon One Year War ace Char Aznable, alias Quattro Bajeena) where all three units were stolen from the Titans' headquarters at Green Noa II (effectively kicking off the Gryps Conflict that forms the background plot of Mobile Suit Zeta Gundam). Launched from the carrier warship Argama, this "Gundam Heist" also netted the AEUG the powerful Newtype Kamille Bidan, who would become the Mk. II's chief operator, as well as initiating the series-long conflict between Kamille and Titans pilot Jerid Messa. Of note, this act marked the first "Stolen Gundam" plot event in the franchise, which has become more common in recent years (e.g. the RX-78GP-02A in Gundam 0083 or nearly the entire starting Gundam cast in Gundam SEED series). Though an initial boon against Titans mobile suits (as well as even more outdated Earth Federation designs, some of which were One Year War-era Zeon models confiscated after the war), the Mk. II's limited capabilities become quite apparent by the time the plot develops to the Jaburo drop operation (starting in episode 11, Entering the Atmosphere), where even the Titans' new mass-produced RMS-108 Marasai mobile suits featured Gundarium alloy armoring. The Mk. II's shortcomings are mitigated, to an extent, by the attachment of the G-Defenser armor booster, constructed by Anaheim Electronics. When combined with the G-Defenser, the Mk. II's mobility is increased via numerous additional thrusters, its vulnerabilities are somewhat