KWA ATP problems

[sigma6]

I haven't played airsoft in a long time. I remember during my last time of play I was having problems with my ATP. Today I took it apart and I noticed that the trigger bar wasn't tripping the hammer. If I push down on the trigger bar, it seems to work for a few shots then goes dead again. Any Ideas on a permanent fix?

[Mikearfifteen83]

Might be the sear