I have the "ROCK SOPMOD" bipod. Troy Industries was advertising them on there website about 2 years ago but did not stock them yet. I called and told them I wanted one, and about 6 weeks later they sent it to me. My bipod has the "PARKER HALE" style ski feet, as it is the only option available at the time. I only paid $150 when I got mine, as I was the first person to get one from TROY and ROCK was not advertising or selling them yet. The bipod is VERY cool! It features 2 nuts for adjustment, the top allows for tentioning to the mounting rail while the bottom adjusts the PAN, TILT and SWIVEL resistance. The legs can be folded either forward or reverse and the leg height is a spring loaded style. It is VERY similar to the "PARKER HALE" design. My bipod is the heavier all steel version, and I guess now that you can get them direct from ROCK CREEK BARRELLS, ther is a lighter "alloy?" version. Bottom line it is a "NO NONSENSE" military rifle bipod. I did notice the MAJOR price increase in the latest TROY catalog they sent me. I don't know what up with that! Maybe the price is a little lower from ROCK CREEK direct? Hope this helps you!