I bought a Harris bipod for my M&P M16-AR15-22-AK-240B-Glock, and it did a good job, but eventually I found I preferred this:
Caldwell Rock jr.
I don't have to switch the bipod from rifle to rifle at the range, I can rest the rifle wherever it is most comfortable, and I don't need anything attached to the rifle. If your use-case differs from basic range target shooting, then this might not be the best choice for you.