Im currently using the stoney point rapid pivot bipod. I have used a 27 inch Harris Bipod and Predator Sniper Styx with good luck also.
I have noticed that John Burns from Grey Precision has a Stoney Point rapid pivot quick attach point on the rear of his stock. On their new stock they sell they advertise it comes with the optional GreyBull Precision Rear Support System. Does anybody know what they are using or have pics of this setup in action?
If they are doing what I think they are doing its probably a very good system as shooting off a pair of shooting sticks or bipod there is always the problem with supporting the rear of your stock.
Precision Hunting Stock