There is an fx service kit available containing all the seals etc needed for a complete strip down and rebuild. Takes about half an hour to strip down or less, unlike the one i am doing at the moment it isn't seized solid from years of neglect. Had to use a broom handle from the front to get the valve body moving and the pellet probe was green and stuck in place. Not sure the customer had used the rifle in years or has just bought it to find it is a very sickly rifle indeed.