Actually Mil-I-45208A has never been known as a QMS. It is in-fact an "inspection system", and that only. It's requirements are virtually limited to requiring an inspection of the product prior to shipment, and segregating/dispositioning any nonconforming products.
That said, I have worked with Mil-I-45208A, Mil-Q-9858A, NHB 5300.4(1B & 1C), AQAP 1 (NATO Spec) and many other Mil/Gov/Fed and commercial specs/standards and have determined that it really doesn't matter which standard a company chooses to (or is obligated to) work under if they choose to do the right things for their business and for their customer any of these baseline templates will work. Because it's not the standard that makes a company succesful, it's their (upper management on down) concern for doing the right things in the right way for them and their customer.
I have worked with a sheet metal shop that provided formed sheet metal panels to be used by a supplier of spaceborne products to NOAA. The shop maintained no inspection activities (either at incoming, in process or final/prior to shipment), they did not have "calibrated" guages, nor did they have any documented procedures; but they had skilled sheet metal workers (average of 23 years of experience) that through contract provided these formed panels with virtually no rejects/returns from the customer (the customer had made arrangements to act as the incoming inspection and final inspection points.)
It was apparent to those of us that were receiving these panels that this sheet metal company had an excellent QMS (one though undocumented, existed in the form of company culture) which provided us with more consistent product than many of our "certified" suppliers.
It's not the Standard that matters, it's the culture behind it.