Glad to hear you were able to fix the problem! The nice thing about the Marauder is that o rings can be had locally. I have blown a breech o ring before due to pellets jamming up in the breech and having to force the mag out. After taking the top assembly apart and replacing it, I was back in business. I find the Marauder to be the easiest air rifle to take down and service. There really isn't anything to it.