I got one of those hand grip bipods >
U.S. Tactical Supply - Grip Pods
Picked it up at a gun show for $60.00. I had a separate handgrip and was going to add a separate Harris bipod but it would have been added weight and more space taken up, then I saw the handgrip bipod and just replaced the handgrip with that one and been happier ever since that I did not add the harris.
Shop around, you can find the grip bipod thing cheaper then at that web page, and cheaper than the Harris.