Hello, I just had my m14 delivered today, all I have done with it is stand it up to let the oil drain down before I clean it, when I picked it up from the box I noticed a solid rattle like noise, I shook it a couple of times and it sounds like something solid is very loose, is this a normal sound for a norc? Or am I going to have to tighten everything up when I take it out of the grease bag. Thanks in advance for your help.