I next what WingedMelon said. I have many Holosun optics, including this 1, and have not experienced a difficulty with any of these. I am truly selling my Trijicon RMR for getting Yet another a single. The 507 is on par, if not greater, than my DPP.When Auto Ordnance was selling the Thompson submachine gun on the open up market from the ’20s, Gen