Military documents are often superseded by up revisions or completely new documents. Unless you have current active access to the controlling authority you have no idea if the document in question is still approved or active. Notice that ACI 88 of 1940 was canceled by ACI 1848 of 1940 illustrating that military documents are not static and change if needed.
Since a significant number of years have passed it is likely that the document has seen further revision.

I am still trying to figure out what the tensile and yield strength of the steel used to manufacture the #4 receiver. Do any of you experts know?