[Swatt Six-Four]

one major thing to check would be your air nozzel. I had a team mate gun jam bad and upon inspection found the air nozzel broke before repairs it was doing almost exactly what you are saying, closer look showed the air nozzel was shattered. replaced the nozzel and he was back in bissness, I figured that since the gun jamed the nozzel slamed into the bb and destroyed the nozzel it's self. Hope that helps