Ok im having big trouble with my custom arm.mdl (well, its your model John 
) Basically i can get the positioning right. The frames are about 160 for a full co-ordinated swing.
The weapons simply hide. They never show. There must be a tag embedded in the stock arm to provide it with the swing model during animation. No matter what, i cant fathom this.
There must be a way. Creatura and I are determined to make a new arm and put it into our games.
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Edit
Ok so i checked out the stock arm.mdl in somimp. I saw that the weird old triangle showed up. So i remade my arm and got something... Not sure what it is.
Check attachments 
) Basically i can get the positioning right. The frames are about 160 for a full co-ordinated swing.The weapons simply hide. They never show. There must be a tag embedded in the stock arm to provide it with the swing model during animation. No matter what, i cant fathom this.
There must be a way. Creatura and I are determined to make a new arm and put it into our games.
------
Edit
Ok so i checked out the stock arm.mdl in somimp. I saw that the weird old triangle showed up. So i remade my arm and got something... Not sure what it is.
Check attachments