Harris is it! Was skeptical until I actually received mine. They are well engineered. Real stout and strong! Absolutely a quality bipod. Ordered mine through Bushmaster. I'm sure you might find it cheaper elsewhere but the bottom line is Harris makes a quality product. Have seen VersaPod but have not tried same. Does not appear as well built but I could be wrong.
With the Harris, connecting to the sling stud is the way to go. As noted, the bipod is easy on- easy off with this feature.