The gun is coupled with it’s own ammunition, which is manufactured to tight tolerances. It then feeds video into a recitcle or ipad app with HUD information on it. You point a laser at the target and move the gun aimer to cover the pip. Once it does, the gun fires. This makes it extremely accurate.

$17,000 Linux-powered rifle brings “auto-aim” to the real world | Ars Technica.