Han Solo's signature BlasTech DL-44 heavy blaster pistol benefits from a highly illegal military power cell and customized energizer circuitry for maximum blast impact. This heavy-duty performance is enough to tear huge chunks from the adobe walls of a desert planet docking bay, and more than enough to permanently discourage the average Rodian opponent.
After the Battle of Yavin, Solo had fitted his trusty DL-44 with an improved silver flash suppressor and a couple of other military components acquired from his new Rebel friends. Solo's modified pistol is a formidable weapon, and his quick-draw skills are honed by long practice with remotes and against living opponents.
Shortly before the Rebels set up their base on the ice planet Hoth, Luke Skywalker began using a BlasTech DL-44 blaster pistol similar to that favored by his friend Han Solo.