[Source] The T-21 light repeating blaster, also known as the T-21 heavy blaster, was a model of light repeating blaster used by some of the Galactic Empire's Stormtrooper Corps. It delivered massive damage at long ranges, however had a low rate of fire and lacked optics. Magma troopers and Shadow Troopers were known to use the T-21. Shortly prior to the Battle of Yavin, a number of the stormtroopers deployed to the planet Tatooine to search for a set of stolen Death Star plans carried T-21s. A long-range version with optics, the T-21B heavy blaster, was modeled after the T-21 design.