Current prototype which is working quite well. But, like DirtFarmer said, it's a lot of fabricating for the average user. I am working on simplifying by integrating both of these examples & fine tuning it. I would prefer something that mounts to the forearm of the stock utilizing the sling stud the way a bipod would to eliminate the adjustment of two separate units.
Original idea, which also worked well but required too much fidgeting.