[quote=@Prince of Seraphs]
<Snipped quote by Onarax>

Generally speaking most of the transforming weapons have a melee and ranged versions. Crescent Rose has scythe and sniper rifle forms, Wiess has sword which can fire dust, Yang has gauntlets for punching which also fire rounds, Ren had gun knives. I don't think we've seen a weapon that has two distinct melee forms yet, though if I'm wrong feel free to correct me.
[/quote]

Neptune has Guandao and Trident form. Pyrrha has a spear that transforms into a sword. Sun has a staff that becomes nunchucks. 

So yeah, we've had plenty of examples.