What am i doing wrong for my mesh's collision zones

[gokitty1199 225]

I have a ipsc target that ive made in blender with AZone/CZone/DZone/BZone/AZoneHead for the areas of the target that I want a bullet to hit. For example, if I put a HitPart event handler on the object and a player shoots the DZone, then I want the selection array of areas hit to return DZone. So far the AZone/BZone/AZoneHead are working without issue and the HitPart event handler returns the array with the zone name correctly, however those are basic square/rectangle shapes. The CZone/DZone are where im really struggling, I have cut them up into pieces to avoid making them non convex shapes (they still might be), but the issue remains of me not being able to hit those zones in game(no collision).

 

.blend: https://www.dropbox.com/s/8efbn8efzl5ry04/untitledNEW.blend?dl=0