The Impulse Gundam Arc from Gundam Build Divers is armed with its distinctive lance, and it comes with a booster for underwater navigation that can be mounted to its back.
From the Gundam Build Divers series
Armed with its distinctive lance
Booster for underwater navigation can be mounted to its back
Impulse Gundam Lancier 1/144 scale model parts
Underwater navigation booster
Extra joint parts
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