I was going to post a similar topic, but I decided to let someone else bask in the fame.
I purchased a Bossk off ebay and noticed I had this rifle variation.
Rather than complain about REPRO and put a seller on the spot, I used some logic.
I compared the Variant 3--for lack of a better name--to two Bossk rifles (Variant 2) I had since 1980.
The Variant 3 floated, had the same colour and--using a 35-watt light bulb--was semi-translucent. (Darker purple speckles could be seen in a blue matrix.) Those characteristics sealed it for me.
I am posting two photos of the New/3 Varient below:
I hope that helps you all.
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Darth Vreenak