In this episode of the "Worth It" series by Combat Sport Supply, they feature the Elite Force HK MP5 Gen2 AEG with EyeTrace... "The Elite Force H&K MP5 Gen 2 Airsoft AEG Replica with Integrated Eyetrace Tracer Unit is innovative. The Elite Force Eyetrace MP5 Gen2 Airsoft gun by Umarex  incorporates an internal tracer units and M-Lok Rail, but is it WORTH It?"