Spartan117gw is going around with the PTS Syndicate EPM Mid-cap magazine and having it tested with various airsoft guns and brands to find out if it is compatible and will be able to feed well. The latest is the PolarStar Airsoft EPAR-15 which has different power source which his HPA, and a different gearbox internals with the Fusion Engine. Did it feed with no hiccupsl? Watch the video below: