This is a gun that can shoot paint. It can change the color of things, make them either red or blue. People are talking about sentries, think about the big picture. EVERYTHING important in this game is red or blue.

Paint a dispenser. It's yours now. Paint enemies, now they're on your team. Sign outside room says it's a BLU resupply room? Nope, now it's red. Sneak up to the final point, and shoot one blue glop at the middle. It's now blue. Instantly win the round. Change the color of the payload so enemies can't push it. Complete any objective on any map, any gamemode, with a pistol that does no damage.

joke post, if it wasn't obvious.