As for the stock, I've had my hands on the Bergara Premier Stalker, which as mentioned, uses the AG Composites stock. The Bergara rep wouldn't let on to who was making the stocks, but if I'd had to guess, I would have Hi-Tech Specialties. That said, the AG Composite felt very much like the Hi-Tech in my hands.
Copied and pasted from my response in another thread regarding Barrett rifles.