Hey guys just wanted to make sure I'm being safe here. I have a 1948 FN mauser, it had been modified to have a trigger safety that you slide back and forth with your thumb. Anyway, one day when I took it apart I lost the little spring that makes it all work. I bought a bolt shroud off ebay that has a Mark II safety on it. Seems to work fine, no issues. Is there anything I need to consider when installing a this safety? I shouldn't affect any of the critical tolerances on the gun right? The shroud had been bead blasted, so I just finished blueing it, looks great!