It's a Halo Brute Spiker, modded from a Nerf Nitefinder! It still fires and the torch still works, and the dart holders are between the blades.
Acrylic plastic for the extended barrel, blades and hand-guard.
Wood for the sights.
1 week of tiring work.
In the Halo games, the Brute Spiker is a heavy SMG-type thing. This gun is only a single-shot pistol... I consider it a different "model" of the Spiker. Or something.