IDK, I liked the design.  Good for a summer game especially.  It says it uses darts and water balls.  

I'll update this when I get to test mine.

Description：
Pistol & Soft Water Bullet Gun
Your Children would love play with it.
Size:21*4.5*14.5cm-8.3*1.8*5.7inch.
Color: as the picture.
Material:Plastic.
Package Included:
1x Toy gun
2x Soft foam Bullet
2x Water Bullet