Alright, I just got my complete set of Mahri this morning and have finished building all six of them. (Nuparu and Hahli being my favorites) I took Matoro's Cordak Blaster, filled my bathroom sink with room temperature tap water, dunked the blaster in the water to get it wet then loaded the missiles. There a drastic difference in the firing distance of the missiles. Surprisingly, when you fire the blaster submerged in water, as soon as the rockets exit their chambers they immediately stopped due to water resistance. They only travelled about an inch away from the blaster's chamber. However, once you've fired all the missiles, the chambers start to fill up with water. Then you can start firing jets of water from the blaster. Once I surfaced it, you can spit the water out of the blaster about three or four times before it's empty. I then shook the blaster to get any remaining drips of water out. So I think it's safe to use it in water, but it won't travel as far. I might try it later in my bathtub since it's bigger than the sink. LEGO should've made note of how you could fire the blaster in both water and air, maybe even make the blaster better for water.