Gensokyo/Kappa Water Rifle

The Kappa Water Rifle is a Hardmode gun. It uses Hydro Charges as ammunition. Its main fire mode shoots a salvo of 8 projectiles. Its alternate fire instead shoots a single high-powered shot: the projectile moves at 150% speed compared to the main fire, and deals 400% knockback and 650% damage. The alternate fire has a cooldown of 6 seconds.

Trivia
The Kappa Water Rifle is a reference to the rifle used by Nitori Kawashiro in Antinomy of Common Flowers, as well as the two fighting games preceding it.