The SX-21 pump-action scatter blaster, which can also be referred to as the SX-21 scatterblaster, or the SX-21 blaster rifle, was a scatter blaster rifle model featuring a pump-action mechanism. It was manufactured by Merr-Sonn Munitions, Inc., and it proved to be an extremely valuable asset for Imperial mudtroopers during the intense combat against the Mimbanese throughout the Mimban Campaign.
Orbak Marauders carrying SX-21 scatter blasters.
Following his escape from Imperial captivity, Chewbacca made use of an SX-21, employing the rifle as a short-term replacement for the bowcaster typically favored by Wookiees. Orbak Marauder mercenaries frequently wielded SX-21 scatter blasters while riding their Orbaks when in the service of both the Alliance to Restore the Republic and the Galactic Empire.