5-Hour, 5-CEU. March 21 and March 22. With 3D printers and online access, firearms have evolved. Nowadays, there are many high-profile cases involving homemade devices. Devices such as ghost guns and Glock switches. Homemade explosives have been around for a while, but because this course would be focusing on weapons that can easily be manufactured by anyone with access to the internet, I decided to include them in this course.