I'll put my zip gun up against this 3D printed wonder any day.

When I was young, we made many explosives. Some were exceedingly dangerous, exploding if they received a slight blow.

The chemistry sets we had then have been long gone from the market, also druggists no longer have the chemicals we would buy from them because they no longer practice the chemical arts but buy their remedies ready-made from the drug wholesalers.

All of the information is out there, however. A short search in any library will yield the "recipes."