[Lord Benendearu]

This is a question that irked me for almost as long as I am watching Kamen Rider Gaim. Why do only Zangetsu and Gaim receive a Musou Saber upon transforming and not the others? What determines if a Rider gets one of not?

I can get why Zangetsu gets one, as its established to be a super prototype in episode 27. So it would naturally come with an advantage over the later suits. But it still strikes me as strange that the Musou saber is not a standard sidearm, as some of the Arms forms seem to require one to fully function.

Melon Arms only yields a shield, making it almost useless without a saber, while Orange, Pineapple and Ichigo Arms make heavy use of the Musou saber.

What are your thoughts about this?