Amped Airsoft are expecting to have in stock the new PolarStar Airsoft F2 HPA Engine and they recommend that you place your orders now to be part of the first batch owners... "HEY YOU GUUUYS! The time is finally upon us, the wait is almost over. Get your pre-orders in for the F2 ASAP so that we can start shipping them out to you as soon as they arrive! First come first serve."