Outdoorsmans Binocular adapter. Its like new, i used it with Leica ultravids so it comes with extra stud for the ultravids if you want to use it with swaros it need $15 stud. Very easy to install takes about 3 minutes. IMO best adapter, billet machined. way more stable than those strap ones.
http://shop.outdoorsmans.com/product.sc?productId=4&categoryId=2$75 shipped. (paid $115 with leica stud)