The DF-D1 Duo-Flechette Rifle represents a flechette launcher design manufactured by the Salus Corporation. This design drew ideas from the FC-1 flechette launcher created by Golan Arms. Salus Corporation developed the DF-D1 with the intention of shrinking the FC-1 into a rifle-sized weapon. As a consequence, the DF-D1 was equipped with two internal magazines filled with needle-shaped flechettes. These magazines could be detonated to release a swarm of high-velocity, extremely sharp projectiles.
Nevertheless, the DF-D1 faced a prohibition before Salus could market it, due to its extreme deadliness. Even with the ban, the weapon became popular with Rodian big game hunters who pursued dangerous creatures like nexu, dragonsnakes, and rathtars. It even earned recognition in Rodia's yearly Atiang hunting competitions. Numerous bounty hunters and mercenaries also made use of the DF-D1 in their profession.