Unstoppable Force is a trait in Destiny 2 that can appear on 18 weapons. There is also an enhanced version with a stronger effect.
What Unstoppable Force does
Blocking damage with your shield increases projectile damage for a short time.
Enhanced version
Blocking damage with your shield increases projectile damage for an improved duration.
Weapons that can roll Unstoppable Force (18)
BackfangArc · Glaive
Ecliptic DistaffVoid · Glaive
Forthcoming DevianceVoid · Glaive
Forthcoming Deviance (Adept)Void · Glaive
Greasy LuckSolar · Glaive
Greasy Luck (Adept)Solar · Glaive
Judgment of KelgorathSolar · Glaive
Lubrae's RuinSolar · Glaive
Lubrae's Ruin (Adept)Solar · Glaive
Nezarec's WhisperArc · Glaive
Rake AngleStasis · Glaive
Rake Angle (Adept)Stasis · Glaive
Refusal of the CallStrand · Glaive
Refusal of the Call (Adept)Strand · Glaive
The EnigmaVoid · Glaive
The HeronVoid · Glaive
Unexpected ResurgenceArc · Glaive
Unexpected Resurgence (Adept)Arc · Glaive