A Sith Har Blaster and multiple enemies.
Another view of the weapon.
The Sith Har Blaster was an exotic weapon of Dreman origin, manufactured by the Sith Har order of assassins, and popular as an export to the Klingon Empire.
Specifics[]
It fired a pinpoint laser that created an ionized path to the target. Subatomic particles were then fired along the ionized path, causing enormous damage to the target. Its ammunition were plasma fuel cells. (TNG video game: Klingon Honor Guard)