3D Printable Ed's Spear from Fullmetal Alchemist: Brotherhood
The spear is about 2 meters in length, although the staff can be lengthened or shortened depending on how much milk you drink. The spear head is about 20 inches long and can accommodate a 1-inch OD-PVC or any other pipe.
If you have any questions or concerns, feel free to email me and I'll be happy to respond!