The Weapon Master upgrade in the Combat Mastery Tree adds 40% damage to ammo powers:

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For the ammo powers there are upgrades that grant the ammo power also to your squadmates. Do your squad mates also benefit from the bonus that is granted to Shepard by Weapon Master, or does that only affect Shepard him/herself?

  • I think this is going to be almost impossible to conclusively test, but I would expect that it does. Also, note that the 40% is an increase to whatever percentage you have, so for example, if you had +10% damage from ammo, the 40% is applied to that 10%, and thus is +14%, not +50%. Weapon Master seemed a lot less cool when I found that out.
    – Sterno
    Commented Mar 8, 2012 at 4:16
  • 1
    Bioware said that percentages add rather than multiply, so 10+40 = 50% rather than 14%
    – user21095
    Commented Mar 8, 2012 at 15:47

1 Answer 1


Yes, squad members benefit from the weapon master upgrade. Remember though that the squad bonus skill grants squad members that ammo at only 50% effectiveness. Therefore squad members ammo increases by 20%, not 40%.

The Bioware math explanation can be found here.

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