Aperture Science Sentry Turret

The Sentry Turrets used by Aperture Science Laboratories function much like the sentry turrets used by the Combine in Half Life 2.

Appearance & Capabilities
The Aperture Science sentry turrets look much more different than the turrets used by the Combine Overwatch. The turrets are plated with with a shiny, smooth, white metal and have a single red "eye" in the middle of the body, which emits a clearly visible red laser, which marks the turret's line of fire. Aperture Science turrets, like the Combine's turrets, stand on 3 legs.