I second what WingedMelon stated. I have many Holosun optics, including this just one, and have never had a difficulty with any of them. I am truly selling my Trijicon RMR to have An additional 1. The 507 is on par, Otherwise far better, than my DPP.There is certainly an ambidextrous safety Found into the rear of your induce guard. Early A5s experi