The Sacros K-11 is seen briefly in the animated short shown during the 1978 Star Wars Holiday Special. Boba Fett uses his Sacros K-11 to fire upon pursuing Stormtroopers, purposely missing them. Chewbacca takes the pistol from Boba and fires on the Stormtroopers, destroying them.
This pistol may be the predecessor of Boba Fett's Concussion Grenade Launcher as seen in the Empire Strikes Back.
No physical prop was created.