I am wondering if there are any issues or benefits of using a Gen 3 trigger with trigger bar in a Gen 4 gun. Does anyone have any experience with this combo? I am told that the Gen 3 trigger bar in a Gen 4 gun will lighten the pull a little, is this true? I know the Gen 4 trigger bars have the alignment bump that the Gen 3's don't, I am assuming this is why it's lighter. Are there any reliability issues of using the Gen 3 trigger bar in a Gen 4 gun? Thanks for any help!