i just went to evike to get mine i called polarstar and they said they were sending them some this month...i bought 2 and used the coupon code AWESOME and got 167 bucks off the 2 engines also bought 2 small tanks and a green nozzle...saved almost 200 bucks on my order...i wouldve bought from redline airsoft but they didnt have coupon codes like evike does...no biggie...im extremely impressed with redline though i placed 2 orders and got an email this morning advising me of a refund....they saw i placed 2 orders back to back...decided to ship them together and refund me the shipping from my 2nd order AND shipped my order the very next morning!