My brother bought a used RT and we took it out to play and test it this weekend and it dun wierd things.... Tank is hooked up and all is fine until air blows out the back throught the velocity adjusting wrench hole....it also makes a high pitch whistling at the same time and it stops when you remove tank or fire a round off and all is fine until it randomly does it again.... I have an RT but have never had this problem....Anyone share this in common? I could use the help....
thanks
Jeff