It might need some work but I made this, it's the Ripper's prototype, the "Splitter" and could shoot the barrels one at a time or simultaneously.
![Posted Image](http://i.imgur.com/PDgWHSK.png)
sources: 3DR, Duke 3d, Lameduke, and Cage's beta chaingun.
Earlier version has now been fixed by Captain J of ZDoom forums (he aligned the barrels properly, as mine the left barrel was slightly lower than the right).
I made this with the idea for a project where Duke must go back in time to where many of his weapons from DN3D are in "prototype" forms (the aliens try to destroy the weapons so that Duke has less of a chance to stop them, or some generic BS). The Ripper becomes a 2 barrel weapon called the "Splitter Chaingun", the RPG is held like the Lameduke one, and could be more powerful but harder to see your surroundings and more of a danger to the player, and lastly the Devastator, would be a prototype version that is just one blaster, and the rockets don't go the way they should (acting a lot like the drunken missile launcher in ROTT), and when Duke picks it up he would say "Eugh... This sucks!"