Oh, well, sounds fun, here's one of mines.
Name: Not decided yet. (probaly Geist Jager)
Type: Intelligent/Armed hybrid.
Forms (Don't have time to clean and scan my designs.):
Stand By: a silver ring with black engravings.
Gunner form: looks like
this x4 (Two always hidden.)
Blade form: Handle straightens, barrel disappear completely and the blade move in it's place extending, transforming into a sigle edged sowrd.
Full Drive: not decided yet, I was thinking of just adding 2 to four bits.
Selling points: good in close to mid range combat, high casting speed for low level spells.
Defects: long casting time for powerfull spells, can be trick to reload if cornered.
I made it for an OC of mine that was born into an Old Belkan family and was trained in the family sword style regardless of his personal talents. Once he was halfway done with his official TSAB training his instructor found out that he was more suited for shooting magic, but since he was already too used to the family style, he needed to find a compromise between his habits and his true talent.
And that's where the device came in, the gunner form can booth be used to shoot or as a swordbreaker/dagger, and the blade form can be used for the OC former fighting style.
The four parts are indipendent, and the user can play around freely with the forms, the purpose of the additional two parts is for quick reload, it's just needed to dismiss an empty one to call a fully loaded one. The real problem is than if all the pre-loaded cartridges are used a free hand is needed to reload one part at time.