Barrel Constrictor is a trait in Destiny 2 that can appear on 14 weapons. An enhanced version exists on crafted and some newer weapons.
What Barrel Constrictor does
Final blows with this weapon reduce its projectile spread for a short duration.
Enhanced version
Final blows with this weapon significantly reduce its projectile spread for an improved duration.
Weapons that can roll Barrel Constrictor (14)
Astral HorizonKinetic · Shotgun
Aureus NeutralizerKinetic · Hand Cannon
Coriolis ForceVoid · Fusion Rifle
Cruoris FR4Arc · Fusion Rifle
Deadpan DeliveryArc · Shotgun
Found VerdictArc · Shotgun
Found Verdict (Timelost)Arc · Shotgun
Phoneutria FeraSolar · Hand Cannon
Prophet of DoomArc · Shotgun
Reckless EndangermentKinetic · Shotgun
RetrofuturistVoid · Shotgun
SomedayKinetic · Shotgun
SwordbreakerStrand · Shotgun
Swordbreaker (Adept)Strand · Shotgun