A quick look by Gaosen Kinetics at the "Quark" tracer unit for airsoft shotguns to be released by Acetech... "An early look from the airsoft show MOA in Taiwan at the Acetech Quark shotgun tracer for the Tokyo Marui KSG shotgun replica, and an example of the features we might see in Acetech’s up-coming tracer units for airsoft shotguns."