2 questions: Trigger spring and Hold open issue

[DonVoigt]

Originally Posted by Sky Zero

ok so for anyone still here, I narrowed down what's going on with the BYF hold open issue and brass issue
I did some swapping of various parts from one to the other and came to the conclusion that the bottom half of my BYF is the cause of the hold open issue while the top half is causing the brass shavings problem. not sure what half is causing the empty brass to get caught between the bolt and the breach

Last problem may be ammo or magazine related.

Does the combination of the two "good" halves work well?