HB-4
this projectile-firing hunting rifle was produced by Prax Arms during the height of the Galactic Civil War. It was unique in that it allowed a trained marksman to virtually ensure a one-shot attack. Trailing behind the projectile was a monofilament cord which fed flight adjustment to the projectile's barbed head. As long as the being who fired the weapon maintained a direct line-of-sight to their target, the HB-4 provided the flight data to the projectile, virtually ensuring a direct hit.