Did you get the rifle? Or not yet? I have a 11fcns, with the accustock. Imo it is good and dose not flex, here is a link too a pic of one. http://www.shootingusa.com/TV_SCHEDU...avageACCUL.jpg
As for if this rifle your are looking at is pillar beded, or not I'm not sure. If the sku number is the same I think it would have the accustock. Some stores get limited runs of rifles built just a little different than the normal builds, exclusive models for xyz company.