I have no other link to the seller but he appears to be legit and the cost is undoubtedly right taking into consideration the scope mount. He seems to have all of the pieces including the mounting block and spacer. Signal-0 Productions Firearms Instruction test it out at Sign-0.com Merchandise https://sage-international-firear29528.weblogco.com/29586534/the-definitive-guide-to-m1a-evr