I have two of these (6"-9" and 9"-13"). I believe they are Harris clones. They seem to work well for what I use them for (casual metallic target shooting out to 150 yds.). They're cheap enough to buy as an "experimental" or "educational" experience, but I don't plan on replacing them. So far, I'm using the 9"-13" regularly.
CVLIFE Rifle Bipod, Pivot Tilt ...
CVLIFE Rifle Bipod, Pivot Tilt ...