Download the DarKlone pack and look at the Heavy's .INIs to see first hand.
Edit: Just noticed the Kloveska army pack is out.
Even better, download that, and look at the Oppresor's .INI's.
Edit 2:
How about this...
Code:
AddEffect = Attachable
   InstanceName = 
   Mass = 0.1
   Sharpness = 1
   HitsMOs = 0
   GetsHitByMOs = 1
   SpriteFile = ContentFile
      FilePath = nt
   FrameCount = 1
   SpriteOffset = Vector
      X = nt
      Y = nt
   AngularVel = 6
   EntryWound = AEmitter
      CopyOf = Dent Metal Light
   ExitWound = AEmitter
      CopyOf = Dent Metal Light
   AtomGroup = AtomGroup
      AutoGenerate = 1
      Material = Material
         CopyOf = Military Stuff
      Resolution = 4
      Depth = 0
   DeepCheck = 0
   JointStrength = 100
   JointStiffness = 0.1
   BreakWound = AEmitter
      CopyOf = Dent Metal Light
   JointOffset = Vector
      X = 
      Y = nt
   DrawAfterParent = 1
   GibImpulseLimit = 1500
   GibWoundLimit = 25
//   GibSound = Sound
//      CopyOf = Bone Crack
//   AddGib = Gib
//      GibParticle = MOPixel
//         CopyOf = Gib Military Micro A
//      Offset = Vector
//         X = nt
//         Y = nt
Try using that, replacing the 'nts' with what you need.