Do we have one of these, and if not can we start one? I think it would be useful to compile the information in one place that could be periodically updated as new rails become available.

I second this, I was curious about this myself!

I emailed about 15 companies yesterday inquiring about compatibility And barrel Nut Dimensions to try and compile some information still waiting to hear back will update when I get returned emails

Please use this link to view our compatible rails at this moment, https://www.adamsarms.net/info-media/faq#qa1. Our drive rods index off a mil-spec barrel nut, which is .85" in length. As long as the barrel nut is this length or can be cut to this length most of the time it will work. You can also use our rail clearance diagram to ensure proper fitment for our gas block, http://www.adamsarms.net/resources/raildiagram.jpg. If you have any specific rail inquiries, please email [email protected].

-Phil-