I am far from a expert on VC Jawa figures but this little bit of info is what I have always gone by :
My thoughts are that a VC Jawa would have probably had a Semi Translucent Dark Green gun - either with or without the side bump .
If you are wondering what AFA would accept : I know I have sent 3 VC Jawa's into them and I have always sent a "Semi Translucent Dark Green gun without the side bump" in with them and they were all accepted and graded
As unreliable as AFA can tend to be though , I would suspect that they most likely would accept any Jawa gun variant .
I also wouldn't be a bit surprised if other gun variations have actually been found on carded examples - hopefully one of the more knowledgeable guys here can chime in with more definite information