Well I took my SGL20 with the Leapers UTG937 it's the non lever one with the three Allen head screws. The $25 one many think is cheaply made of poor quality material and will quickly fail in service. I quickly slipped it on my SGL20 and tightened the three screws. Mounted my 553 EOTech on it's 1913 rail.
Both the mount and the EOTech. fit tight and solid. Getting it zeroed in just took maybe 10rds. I was able to get really good groups for my old eyes. Mostly because of the quality of the EOTech.
Anyway to make a long story short,after over 200rds fired, The leapers mount was still fitting solid with no material failures. Allen screws still tight,they never needed to be tightened again.
So maybe I am the only lucky person who ever bought a Leapers mount.