Trijicon has a good line of AR scopes, I think they even have a contract from the military with their acog scopes but this scope is not anywhere close to what it is priced. I have hunt that same box for 11 years using my leupold vx-3 and no problem. The vortex I want (Vortex Viper PST 4-16x50 MOA) is backorder everywhere I have looked for it. I will check those sites you mentioned....