[sprintz25]

Thanks for your reply. The annoying thing is, i cycled the bolt quite a few times prior to changing the bolt knob and it didnt have any issues. I watched plenty of youtube clips and bolt disassembly is very straightforward so i really dont understand why the shroud is rubbing the receiver now that i've changed the bolt knob. I've ever gone back to the original bolt knob and the shroud is still rubbing.