The UA 571-D Ground Sentry was a 12mm anti-aircraft artillery emplacement manufactured by Weyland-Yutani.
Malcolm Reynolds, a sergeant for the Independent Planets, used one of these emplacements to shoot down an Alliance skiff during the Battle of Serenity Valley.
Behind the ScenesEdit
The weapon appears to be the dual DShK (likely mocked-up M2 Browning) AA machine gun emplacement used in Starship Troopers.
The Insignia for the Weyland-Yutani Corporation is visible on the weapon. The weapon's name itself is a reference to the UA 571-C Automated Sentry Gun featured in the 1986 film Aliens.