Hello Everyone need help with this one!!! Mossberg 500AG 12 ga. 1983 Mfg date.
Problem is that the gun fire’s when the pump is slid forward. I have taken the trigger mechanism apart cleaned and reassembled. The sear and hammer are good, the disconnector appears to be good but I suspect this to be the problem. When testing the trigger assembly out of the action, the disconnector moves freely and moves away from the sear when the trigger is released. When I manually cock the hammer, I have good contact between sear and hammer. I believe the problem is when the bolt goes forward the disconnector rises up and causes the shotgun to fire. I adjusted the trigger stop screw so the disconnector moves all the way to the rear. I open the action, wiggle the trigger from side to side (the trigger doesn’t move forward or backward so the disconnector doesn’t move rearward). The hammer stays cock when the pump slides forward. The problem is intermittent. Something is hanging up; anyone have a similar problem with the shotgun firing with your finger off the trigger when the pump is slid forward. Thanks John