Have the Stoney Points and the newer Primos version. Prefer the originals. 8 ounces and have worked well for me and my sons. Quick to deploy, and easy to adjust for kneeling/sitting. You can get lower by just not connecting all the sections. Not ideal, but doable.
Have seen the original Snipepod on Huntsman22's rifles, and it is slick, but have not used it myself.
