[Source] The DC-19 "Stealth" carbine was a blaster carbine in BlasTech Industries' DC-15 blaster line. The DC-19 was equipped with a sound suppressor unit for silent operations and an optional stealth function, which used a refined tibanna gas mixture that made the DC-19's laser bolts invisible to the naked eye. However, the tibanna mixture was highly expensive, had to be reloaded after ten shots, and needed to be cooled down after each shot to prevent damage to the carbine's dampeners. The DC-19 was used almost exclusively by clone shadow troopers in the Grand Army of the Republic during the Clone Wars and for a short time afterward, when the clone shadow troopers became part of the Imperial Army.