This company is Chinese , like any sub 1k optic, there are some good YouTube videos torture testing it, definitely beefy. It's pretty heavy with a built in mount but it is tough and the glass is very clear. I tried it with .308 and .223 and its fine with decent eye relief and a daylight bright reticle. I compare the quality and glass as a bit better than the Strike eagle or Primary Arms of similar price range. The Red Dor is a 2 MOA Primary Arms, solid little unit. Ill accept a reasonable offer of course.