I haven't any other link to the seller but he seems legit and the cost is definitely right looking at the scope mount. He seems to own all the elements such as the mounting block and spacer. Sign-0 Productions Firearms Coaching test it out at Signal-0.com Thanks for your guidance. https://sageebrforsale96295.fitnell.com/70274620/fascination-about-sage-ebr-chassis-for-sale