I don't have any other relationship to the vendor but he appears to be legit and the price is absolutely correct looking at the scope mount. He seems to own each of the pieces such as the mounting block and spacer. Sign-0 Productions Firearms Schooling check it out at Signal-0.com https://tysonctcra.blogdemls.com/29300730/an-unbiased-view-of-mk14-ebr-chassis