The terms glock switch, gun switch, auto switch, and auto sear increasingly appear online as shorthand for devices that convert pistols into fully automatic firearms. These devices are illegal in many jurisdictions and extremely dangerous. Responsible firearm owners should reject any interest in modification that increases lethality outside reg

The history of coffee is, to some extent, also a history of the evolution of grinding technology. Whether a cup of coffee's flavor is perfectly released depends almost entirely on the grinding process. The development of coffee grinders is not a simple iteration of tools, but a chronicle of applied physics, materials science, and flavor chemistry