Police in a handful of big cities have seen an increase in 3D printed guns over the last few years. That's leading gun-safety ...

A small but growing number of American firearm enthusiasts are joining RedNote, an app known in China as Xiaohongshu, in an effort to teach native users how to build 3D-printed guns. One such advocate ...

A special agent with the Pennsylvania attorney general’s office demonstrates how to assemble a ghost gun. Built in about an hour, the weapon was fully functional. (NBC News) Police investigating the ...

For decades, weapons manufacturing has been the domain of arms industry heavyweights: Glock, Sig Sauer, Remington, Sturm, Ruger & Co. Making a gun from scratch at home required thousands of dollars of ...

For decades, America's detectives have made breakthroughs in crime using gun traces. A homicide investigator typically uses ballistics and serial numbers of weapons checked via a vast network of gun ...

NEW YORK (WABC) -- In just hours - and for a few hundred dollars, you could make a real gun in your house that is untraceable - and nearly 100 percent polymer. It can all be made on a 3D printer -- ...

Police investigating the shooting of UnitedHealthcare CEO Brian Thompson on Dec. 4, have announced that the suspected assailant had used a 3D-printed gun. Several high-profile crimes in recent years ...

A man in his thirties known online only by his screen-name instantly recognized the gun seized from the suspect in the killing of the UnitedHealth CEO earlier this month. As a photo circulated online ...