The Samsung SGR-A1 is an autonomous, stationary robotic sentry gun developed for the South Korean military to guard the Demilitarized Zone (DMZ) with North Korea, integrating surveillance (cameras, thermal), tracking (laser rangefinder), and weapons (K-3 machine gun, grenade launcher) in one unit to detect, identify (voice recognition), warn, and engage threats, capable of autonomous or remote operation. It aims to enhance border security, replacing human guards in harsh conditions with features

This is Not a Machine from Robocop, Just Samsung's SGR-A1, a Sentry Robot That Can Hit Targets 2-Miles Away

Everything We Know About Samsung's Machine Gun Robots - SlashGear