Another vote for Harris. I have the HBL(9-13") model without swivel or leg notches. It's my favorite bi-pod on the market. I use it on a few different rifles I have. I mounted it on a CAA adapter.
collapsed-butt stock hovers, resting on mag in pic but not when shooting flat or slightly upward.
half way-butt stock touches the ground and mag clears.
fully extended- goofy looking, but it works well.
folded