Old-style Hyperion's pistols have higher damage output at the cost of significantly lower accuracy and fire rate than their modern analogs. They also have a limited version of Hyperion's "reverse recoil" when aimed down the sights only.
The Expeditious uses the Vladof twin barrel, functioning like a miniature SMG due to the properties of the barrel, which is somewhat low damage per shot for a pistol, but the high rate of fire gives the Expeditious a very high damage per second. Moderate magazine size and reduced recoil, coupled with excellent accuracy and a high RoF, makes the Expeditious a very reliable pistol.
The Expeditious is only available at green or higher rarity.
In addition to the Expeditious, a variant of this weapon exists in Borderlands: The Pre-Sequel as the Synergy, made by the "new" Hyperion.
Expeditious' have hexagonal stabilizers attached, which gradually spread open as they fire. This feature is common for E-tech weapons introduced in Borderlands 2. However, unlike the E-tech pistols, stabilizers' interiors do not glow and the Expeditious' are capable of scoring critical hits.
The Expeditious is obtained randomly from any suitable loot source.