The Water Rifle Up1 is very bulky in design, it has the same light blue receiver as the Water Pistol, but also features a black handle an orange/red frame around the gun. It also sports a clear water cartage, a long grey barrel with four red buttons on each side, a red muzzle, and the same, water gauge as in the Water Pistol.
Just shoot the enemy, stay a medium long range.
Aim at the floor, near the enemy to increase area damage.
Bring out another gun that shoots faster.
Avoid getting hit by maintaining a long distance from the enemy.