Thats the Stalker Stickbow riser with the G10 insert. It feels a lot heavier than my other wood risers.
You can only see the G10 in the limb pockets....pretty slick how they hollow it out like that. I think they are about $850 now- getting expensive. Mine was one of the first he made.....I had to enlarge the ends of the limb pockets- I put in a couple little half moon radius with a drum sander so the Uukhas didn't rub.