I have a friend that while he was taken his stock off his rifle some how he broke the trigger and asemble,well make long story short, he found a trigger asmble of gun broker and won the auction and put it one his rifle any way, he says it wont fire now and the bolt moves up and down real freely with out much resestance, but he said if he pushes on the back of the bolt with his finger then it will fire when he pulls the trigger,and wont fire if he dont push the bolt forward,can u guys tell me whats going on with this trigger all the info will help thanks