Twin buzzsaws make everything better.
Space is big. You just won't believe how mind-bogglingly big it is. While the Imperium of Man spans millions of worlds, there are still many alien worlds that require cleansing. As such, it's entirely possible that a freak warpstorm might dump a Gundam or two onto a planet infested by Orks. After all, they already invaded Hearthstone. Hobbyist "Irondog" created just such a mashup, showing what a Gundam would look like if it got looted by a band of Warhammer 40K Orks.
He starts out with a classic Gundam RX-78 model and then gets to work. Extra bits of armor get bolted on in a haphazard fashion, and the hands are replaced with dual buzzsaws, naturally. There's a ton of little details, covering the model, like the spiked toes added to the feet, and the hoses/wires powering the new additions. My favorite are the little chains connected to the twin buzzsaws. They're so cute.
Irondog documents the entire conversion process in pictures, which is as fascinating as it is impressive. He's also built an Ork Stompa out of a Mr. Potatohead and an Ork Warboss riding Akira's motorcycle. Personally, I'd like to see what an Ork might do to a Transformer.
Source: Irondog Studios