happypred- from what i know-no there is no colored wersion.
And about dual cannons... I have draw a pred- Hive killer his name, and he is equipted with 5 plasma casters
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But then I thought...why only 5... and Upgraded him, now he has 10 plasma casters
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, need to have all that firewpower because well, My idea for this character was that he alone can "clean" for example an alien hive.
By the way- found this lately on deviantart, pretty badass