This is a printable model of the Spear of Longinus from anime Neon Genesis Evangelion. When all four sections are assembled the finished product is ~52cm long.
I am not the original creator of this model, it was converted from Steam Workshop files made for Source Filmmaker by Maestro Fenix, cleaned up in Meshmixer and cut into printable sections for an 18cm bed. During the cleanup and filling in Meshmixer one of the prongs ended up slightly shorter however it didn't bother me so I didn't pursue a solution.
I have included an .OBJ of the repaired model that is 52cm long in case anyone wants to modify dimensions or cut it differently than I did.
If you are interested in working off of the Source Engine file you can find it here: http://www.thingiverse.com/thing:1836011
Please post pictures if you make one, I'd love to see other people's results!
I am not affiliated in any way with ADV Films, Gainax, or Tatsunoko Production and do not lay any claim to Neon Genesis Evangelion or this spear as an original creation.