I next what WingedMelon mentioned. I've several Holosun optics, like this one particular, and haven't had a problem with any of them. I'm in fact selling my Trijicon RMR to get another 1. The 507 is on par, if not greater, than my DPP.With armed service and law enforcement sales low, Auto Ordnance sold its submachine guns by means of every authoriz