Here is short review by Reapers Airsoft of the ICS Sirius Eagle, which is almost an hour long. But knowing his reviews, this is indeed short... "Hello guys, today there is a 'SHORT' review of the ICS Sirius Eagle with Begadi Core EFCS / Mosfet. Unfortunately the HopUp didn't work well in my model, Begadi is currently exchanging the bucking for a maple leaf."