➀ An Oklahoma man faces 20 years in prison for supplying over 100 3D-printed machine gun conversion kits to an FBI undercover agent posing as an al-Qaida operative;

➁ The FBI sting operation uncovered the suspect's broader activities, including sharing military manuals, discussing nuclear weapons, and cyberattack plans;

➂ The case highlights tensions between free speech, gun rights, and national security risks posed by 3D-printed 'ghost guns.'