[Matrixbeast]

Zyuranger's Howling Cannon. And no, I'm not just naming it for nostalgia's sake. It's just the coolest looking combo weapon that comes to mind. Every other team weapon that I really enjoyed were just standalone, like the GekiBazooka or the Fire Bazooka...
I just really, really love the design of the Howling Cannon. The crossbow look it has with the five barrels. It just looks great. Having never owned one, I have no idea how well the toy looks in adult hands, however.

A quick shout out goes to Gaoranger/Wild Force's combined sword. I really loved it, but it wasn't as amazing looking. The sword looked a little too loose for my tastes.