Hyperion submachine guns are highly accurate but they have the feature of "reverse recoil": the weapon has initial sway and only becomes accurate with sustained shooting. The listed accuracy on the weapon is what is achievable after the sustained fire increases their accuracy to maximum.
The Projectile Convergence can come with a variety of barrels. Each one can give the gun different properties:
Tediore barrel (lite) – Increases reload speed and accuracy but decreases damage.
Bandit/scav barrel ("heavy") – Increases the weapon damage but decreases accuracy.
Maliwan barrel (stock) – Increases weapon accuracy. Due to a glitch in the weapon generation system, this variant can spawn only without an elemental capacitor.
Gearbox Projectile Convergence – Unique (but common-quality) variant that is available exclusively as a part of the Premiere Club pre-order bonus package.
Commerce – Uniqueshock variant with an animated skin.
The variants of this submachine gun in Borderlands: The Pre-Sequel can spawn with Hyperion's new-style or old-style sets of materials and prefixes.
Old-style Projectile Convergences have higher damage output at the cost of significantly lower accuracy and fire rate. They also have a limited version of Hyperion's "reverse recoil" when aimed down the sights only.
The Projectile Convergence is obtained randomly from any suitable loot source.