I have 4 of Riton Optics Red Dots, and I could not be happier. 2 are on 9mm PCC with over 1000 rounds each and zero issues to POI. 1 is on a S&W M&P 15/22, and one is on an SBR. For the $, they are a bargain. They are well made and, as I stated, not one issue. I have two more on order! I'm glad...