I couldn't have bought the Rebel Trooper Battle Pack without the Imperial one, too! And while this set looks a bit cooler than the laughable attempt the rebels made, I decided to make an alternate to this set too.
Here we have the "Imperial Plasma Cannon". Stationed on the snow and on AT-AT boarding hatches, it proved to be somewhat of a menace to Rebel forces. Unlike the common blaster bolt, its plasma shots are influenced by gravity.
It carries an easily replaceable power source on the side, and because of the cannon's small size, it's expendable. Many fell during Hoth, but not before taking out some turrets of their own. Those plasma shots are known to sizzle right through metal like acid on flesh. A morbid analogy, but you get the picture.