Is this a good weapon sight for AR 15?

Just buy a real Eotech HWS. That clone is meant for airsoft guns and is probably horrible. Real Eotechs cost around 400 dollars but are well worth the money. Aimpoints are also good optics you should look at, but will cost a little bit more than Eotechs, but they do have an amazing battery life that last 80,000 hours(?) or something like that. I could be wrong but I know the number is 5 digits.