I received my no name red dot sight from E-bay a few days ago. ($18.80, free shipping.) A week later my 4 slot quick detach 1 inch riser mount arrived. I was impressed with both the mount and the red dot. Today I went to my range. My first group of three shots at 50 yards from my Kel-Tec sub 2000, 9mm measured 1 1/2 inches, a little bit low and off to the left. I put in 5 clicks to the right and no elevation. That group was now off to the right and still a bit low. I backed off 3 clicks and added 3 clicks of elevation. The final group was 1 3/4 at 50 yards and right in the bulls eye. I rang the dueling tree and broke all the 6 clay pigeons I had mounted. I was very impressed with everything I used today. I don't know if the sight will be back to zero when I remount it and shoot it again.........