At this time, we do not offer a bipod that can attach directly to a sling stud.
We have not discovered a method to do so without using the sling stud in a way it was not intended to be used. The threads that screw in upward into the stock were not designed to handle the downward pressure when loading a rifle or the recoil with a bipod attached to that stud. It will eventually weaken, compromising the support of the rifle or stripping out all together.
For synthetic or wooden stocks, we suggest asking a gunsmith to drill a second hole into the stock for installation of a 1913 style Picatinny Rail. Check out our Atlas Bipod Comparison Chart for each of our models and their specifications.
We strongly recommend a competent gunsmith to do all modifications to any firearm. If you have the necessary skillset and tools, check out our video of How to Install a Rail.