Bipod for Vulcan

You need an atlas afar adapter kit installed on that euro rail. With that, you can install any bipod of your choice that attaches to a 1913 picatinny rail. This is what I use on my Vulcan.

http://www.opticsplanet.com/atlas-bipods-afar-kit-accuracy-international-freeland-anschutz-rail-kit.html

Here is another choice that I use on my RAW and AA Ultimate Sporter with Euro rails.

https://www.rapidairweapons.com/xcart/product.php?productid=17736&cat=266&page=1

The one from Atlas is more "low profile" and drops down less and is black anodized.