Well did you change the safety block? Cause sounds like yours is worn. Or the connector in your trigger group. The tip is what the safety sits over to keep trigger from moving.
Yep picked up my parts off ebay.
Then mossberg virgin reciver gunbroker. 49.00 shipped to my ffl.
I just wanted to build my own for the fun if it. The.mossberg pump is such a simple gun to build.