Thanks for the link, I was so confused about this when I first read it. Its, in fact, a fore end, not a stock. . .why the heck do they call it a stock lol. I was looking all over the place for some kind of secret squirrel stock with keymod on it legitimately wondering why the heck you would put keymod on a stock!
Rifle Dynamics modded one to work with an Ultimak rail, and it is glorious! I asked them about it and they said they might offer it as an option/upgrade in the future. I know I want two of them if they do end up releasing them. Even if I have to put in a custom order for them and wait 6-12 months.