I think the Rambo is pretty outclassed by the Fireaxe. The Bell has a role of distracting zombies for your team to use it over the Fireaxe. The Rambo is much more expensive than the Fireaxe yet doesn't really give the player any reason to use it over Fireaxe. The jump I know is unrealistic and a glitch but it was a feature that made the Rambo unique and Place had decided to keep in the original R2D. The jump would improve the Rambo's purpose of being able to get out of dangerous situations alive.