One of the new arms introduced to U.S. military service in the 1850s was the Model 1855 pistol carbine, designed to pull double-duty as a shoulder arm and a pistol.

The shoulder-mounted head-tracking gun turret allows the wearer to shoot at targets while hovering above the ground. Comments. Technology. Sophie Curtis Technology and Science Editor.

In a video posted to TikTok, Gravity Industries founder Richard Browning has shown off what appears to be live-fire aerial testing of a shoulder-mounted, head-tracking weapons system for the Iron ...