Triple Zanpakuto,Kido Gun and Kido gun upgrade

I got this idea while i was rping then!
There are a lots of people only using 1 or dual zanpakuto only.
I cant see there are any triple zanpakuto(the people who weilds 3 swords at once).
But i afraid that it might over-powered if there are triple zanpakuto.It might can block almost 4 attacks with 3 zanpakuto.
But it might be a great idea to increase a little bit of strength and defense on themselves with 3 zanpakuto.
And i've seen none people use a kido gun.But i MAYBE did see some of them.Maybe.Use guns.Bows like the quincy is normal but the thing is about the kido gun.It might can be sold as a yen stuff though and an upgrade for the kido gun upgrade into a kido cannon.

This is what i've planned:

Name: Kido Gun
Info: This weapon was developed by the Bount creator, Ran-Tou.
It is similar to the Kido Cannon; however, unlike the Kido Cannon,
which can only be fired once, this weapon holds more resemblance in
functionality to a shotgun. It fires concentrated spheres of spiritual
energy that can be quite harmful, as it was capable of severely injuring almost any people. It is unknown as to where the Kido Gun's energy source is derived from.

Name: Kido Gun Upgrade
Info: Able to use this once to Upgrade and turn the Kido Gun into a Kido Cannon. the Kido Cannon is a high-intensity energy weapon powered by Kido. It
consists of a crystalline focus point attached to the top of a massive
pole, with several smaller crystal structures circling up towards the
main one. It is powered by hundreds of Shinigami working in concert,
creating an energy blast capable of obliterating a small dimension. The
blast forms into several animal shapes which roar just before contact.
The power of the blast is such that, in addition to destroying its
target, it also causes a small amount of damage to both the Human World and Soul Society. Despite its power, it is not a reusable weapon, as it burns into a pile of scrap after being fired.(Able to fire once etc.)