I just wanted to share this for those of you out there. If you are looking for information on items that Rock Island Arsenal produced throughout its history you can contact the present day Arsenal to request specific information. You can request information on your rifle by serial number however specific information is extremely limited.
Just recently a huge number of original technical drawings have become available as well. These include a lot of M1910 equipment, most if not all 1903 rifle drawings, M1917 US Enfield drawings and many more. Its free but you have to request in