The Bison B45 was a primary weapon for the Gunner class in Blitz Brigade. It is grenade launcher with a capacity of that 8 grenades in its cylinder. The B45 is very useful against mass infantry, as the grenades deal a lot of splash damage and direct hits, which also do enough damage to finish off opponents. An interesting fact is the grenades will explode sooner than on the Bouncy Joe and on the Rancor. It is wise to find a safe spot to reload, because the Bison takes a very long time to reload. Unfortunately, this weapon can be considered worthless when compared to the splash damage weapons of the Demolisher.
This weapon was removed from the shop for unknown reasons, but disappeared completely after a tournament where the player would get a free Bison. When the tournament was over, the Bison never returned in the shop, and was no longer available, what made the Rancor and Bouncy Joe the only gunner-grenade launchers in the store. The Bison may have been removed due to people complaining about the power because it was extremely powerful back then. It is based on the RG-6 Grenade Launcher.