And I am really impressed! Went to the range today, which I thought would be packed and surprisingly it wasnt. I had it dialed in last time at the range but didnt know I had to tighten it onto the frame REALLY tight. After 10 rounds it was way off! Shot 150 rounds from it today and it didnt move and it is dead on. Great tool because when I was shooting 1 handed or left handed I can see it move and worked to correct the problems. I dont want to ever rely 100% on it but I was really happy, even not using sights I was grouping really well including double tap and rapid fire. Excellent range trip! I didnt even taker out my NIB G19 because I wanted to get more range time with my EDC. That will be the next trip!