Contrary to my initial hypothesis, this blaster does NOT appear to launch water-propelled darts. Rather, it appears to be a combination blaster that can shoot darts OR water, reminding me of the Nerf: Switchshots series from ~2000. I am unclear if there is a selector switch or not.
Stumbled across another Nerf Super Soaker water blaster model I haven’t come across before on this Swiss website – the Nerf Super Soaker Rebelle Infinity Fire
Looks like it’s a pump-action water blaster, but meant to be braced against one’s shoulder (slightly) to provide more stability/power when using? Not sure how much better it will perform compared to older models like the Nerf Super Soaker Rebelle Blue Crush.