[GoseiWonder]

What do I mean by Combo Weapon? Simple, things like the Highway Buster, Gosei Cannon, Renketsu Bazooka, Giga Formula, etc.
Five color-coordinated weapons that combine into a Super Weapon.

"But GoseiWonder, why are you putting this in the toy thread? Shouldn't this be in a series discussion subforum?"

Because I'm not talking about the "best/most powerful in the show." I'm exclusively talking about the toys.

Which ones have the best design, best sounds, best overall size, best individual weapon size and above all, best reason for an adult collector to give a damn about owning one?

[FormerTitanium]

Oh damn, I forgot they were called but those time force blasters cannon things were huge fun, they were decent size for kids and could also combine. I don't remember any of sounds with them though.

[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.