Nerf's new "Brainsaw" is the closest Chainsword analogue thus far (with a little modding) : r/Warhammer40k
NERF Zombie Strike - 'Brainsaw' Official T.V. Spot - YouTube
As you may see, I have a piece missing from this brainsaw. the little handle for the string that activates the saw part. Does anyone know where I could find a 3d printable replacement, or simply a replacement in general? I have the string secured nicely within ...