Master of Arms is a trait in Destiny 2 that can appear on 36 weapons. There is also an enhanced version with a stronger effect.
What Master of Arms does
Kills with any weapon improve this weapon's damage for a short time.
Enhanced version
Final blows with any weapon improve this weapon's damage for an improved duration.
Weapons that can roll Master of Arms (36)
AgapeSolar · Hand Cannon
AntedateArc · Submachine Gun
Cusp SempiternalVoid · Auto Rifle
DeadlockStasis · Shotgun
DECATUR 02Stasis · Auto Rifle
DrangSolar · Sidearm
Gnawing HungerVoid · Auto Rifle
Hawthorne's Field-Forged ShotgunStasis · Shotgun
High TyrantVoid · Pulse Rifle
IntercalaryStasis · Auto Rifle
IRONWOOD 03Void · Hand Cannon
Kindled OrchidVoid · Hand Cannon
M-17 "Fast Talker"Stasis · Submachine Gun
MIDA Macro-ToolArc · Shotgun
MIDA Mini-ToolSolar · Submachine Gun
Mint RetrogradeStrand · Pulse Rifle
Motif-41Solar · Grenade Launcher
Multimach CCXKinetic · Submachine Gun
Mykel's ReverenceStrand · Sidearm
Mykel's Reverence (Adept)Strand · Sidearm
No SurvivorsSolar · Submachine Gun
No Survivors (Adept)Solar · Submachine Gun
Nox Sidereal IVStasis · Fusion Rifle
Null ComposureVoid · Fusion Rifle
Opaque HourglassArc · Combat Bow
Peculiar CharmKinetic · Submachine Gun
Shayura's WrathVoid · Submachine Gun
Song of Ir YûtArc · Machine Gun
Song of Ir Yût (Adept)Arc · Machine Gun
The RecluseVoid · Submachine Gun
Triple LaureateStasis · Hand Cannon
UnfallArc · Sidearm
Vision of ConfluenceSolar · Scout Rifle
Vision of Confluence (Timelost)Solar · Scout Rifle
Word of CrotaVoid · Hand Cannon
Word of Crota (Adept)Void · Hand Cannon