I finally found the index for the MWO's that gives the header description.
For anyone that cares it is located in: Department of the Army Pamphlet 310-4.
A link to the book.

https://books.googleusercontent.com/books/content?req=AKW5QacI1D880fDxGK5sKCzGrfL1vToNVInZL6bWmWXpkzBCNV4TW-tQnUYj6-UcF0T6RxLYDI-Kb4-aNWez-OTHObsOOyJE7NQ-LFaY_qu1fN0MBjWq1YTwmc02cA3lBbcweFIStFDGFVQcGty6ZdBysZDcGFX-LqksyFa1MioDCdvG33DyJrm0F839wNfuRZB5cKI6onbWxCu_BAF90hAlm6-6eRB5sK1fU1-22Bmpe5T_vJ3ZKkAScY_Ps_kyEseYUAPBusLk-38x9WcgfOaoPOFKdbCStkW_dfFcBUM9z1VW8Yhp0c4

On Thu, Feb 17, 2022 at 12:54 AM Joe Duszyński <joeduszynski1@gmail.com> wrote:

Does anyone have the titles of the following:

MWO SIG 152
MWO SIG 82
MWO SIG 60
MWO SIG 56
MWO SIG 11-352-1
MWO SIG 11-352-2

Thanks.

I could not find them on Nicks Website.