This is a schematic weapon built from the following; a Nuka-Cola Quantum, a tin can, turpentine, and Abraxo Cleaner. One of the schematics are found on the bottom floor of the Yao Guai Cave, in the northwestern-most area, under a pile of skeletons. Doc Hoff sells another and Sierra Petrovita in Girdershade has the third, which she rewards you with for the Nuka-Cola Challenge quest. Every schematic increases the number of grenades created per set of materials, up to a maximum of three. Its damage is 501 plus fire damage plus radiation.