The original M14 mounting system consists of two mounting slots and one threaded hole on the left side of the receiver. However, different receiver manufacturers have different tolerance on the slots and sometimes even the threaded size. This can create issues for some side-mounting bracket. Our design is based on the more consistent rear sight base and the clip guide dovetail - this gives us a centrally-aligned mounting system. Also, the dovetail T-nut and the front height-adjustable set screw combination ensures that the scope mount can work on all receivers from different manufactures and ages.