Give me a bit, I removed the balls in 3ds but those models are on a different system. I'll edit this post when I get them added.
FYI, the balls serve as markers, they do the following:
primary = a primary emission point, this is for barrel flash or similar effects, some models have more then one primary
secondary = a secondary effect when the weapon is fired
hand = a hand placement (where a model attaches to the characters hand)
#ground po = is the point that 'attaches' to the ground, this is used to try to keep a weapon model from penetrating a ground plane when dropped
#mwa = I haven't figured out, this is the one that throws calculations off, every weapon has one
frames = used in animating the weapon
vent, heat flar, etc
some of these not only give a visual effect but may be used for audio effects
These balls cause weird results and pepakura doesnot allow you to delete the object, you can thin them down to 4 points, but pepakura has a memory issue which causes it to crash if it tries to store too many undo levels, or if an operation causes an invalid surface.
OK, have the revised 3ds files uploaded & linked here:
Pepakura Download Database ; go to post #14