Lysian sentry pod

A Lysian sentry pod

Lysian sentry pods were twenty-nine meter long unmanned sentries, programmed to defend the Lysian Central Command. The pods were equipped with fusion generated pulse lasers, and minimal deflector shielding. The Lysian system had 47 sentry pods around its perimeter. (TNG: "Conundrum")

For more information on the studio model see: TNG studio models.