I haven't any other relationship to the seller but he appears to be legit and the cost is certainly suitable contemplating the scope mount. He appears to have many of the areas including the mounting block and spacer. Sign-0 Productions Firearms Coaching test it out at Signal-0.com Convenient self stowing https://sage-international-stock46543.bleepblogs.com/30025285/a-secret-weapon-for-sage-ebr-stock-m1a