Onslaught is a trait in Destiny 2 that can appear on 21 weapons. There is also an enhanced version with a stronger effect.
What Onslaught does
Final blows with this weapon increase its rate of fire.
Enhanced version
Final blows with this weapon increase its rate of fire for an improved duration.
Weapons that can roll Onslaught (21)
AdjudicatorKinetic · Submachine Gun
Auric DisablerStrand · Auto Rifle
BreakneckKinetic · Auto Rifle
Fair JudgmentStasis · Auto Rifle
HammerheadVoid · Machine Gun
IntercalaryStasis · Auto Rifle
Lethal AbundanceStrand · Auto Rifle
Marcato-45Strand · Machine Gun
Origin StoryKinetic · Auto Rifle
Perfect PitchSolar · Submachine Gun
ProsecutorArc · Auto Rifle
Prosecutor (Adept)Arc · Auto Rifle
Ros Arago IVVoid · Auto Rifle
Seventh Seraph CarbineKinetic · Auto Rifle
Seventh Seraph SAWArc · Machine Gun
Seventh Seraph VY-7Arc · Submachine Gun
Synchronic RouletteStrand · Submachine Gun
The Forward PathStrand · Auto Rifle
The Ringing NailSolar · Auto Rifle
VS Pyroelectric PropellantArc · Auto Rifle
Zealous IdealSolar · Auto Rifle