Tips in adjusting sights and optics in airsoft needs a refresh and Chris of REMF Tacticool does just that in this video... "A rarely brought-up topic in airsoft but one I think should be more commonly known about. It's rare for airsofters to not have at least iron sights on a gun and most out there use a red dot of some kind which can usually be zero'd; instantly making that same sight massively more useful at basically no cost."