I saw that on social media as well. Not sure if it’s the same one, but I saw some pics a couple weeks ago on social media showing a design that was a 2-piece 3D printed set of skins with an AR grip tang. I’d prefer the skins to be aluminum, but they look like they’re working.
There are a few reasons I didn’t pursue this design myself, one of them that I’m lazy haha. But the width of the chassis and skins make it hard to integrate a thumb rest that lines up with an AR grip tang. So I think this design will be perfect for a thumb wrapped around hand position, it’ll be interesting to see how it feels with a thumb on the side hand position. I did notice one of the rifles in the picture above has my thumb shelf on it still!
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