Dear Mr. Kauten,
Thank you for posting your request on History Hub!
We searched the National Archives Catalog and located a series titled Records of Divisions, 1917 - 1920 in the Records of the American Expeditionary Forces (World War I) (Record Group 120) that includes a historical decimal file for the 112th Machine Gun (Box 11). We also located the series Records of Machine Gun Battalions, 1917 - 1920 in Record Group 120 that may include information on the 112th Machine Gun. For access to and/or copies of these records, please contact the National Archives at College Park - Textual Reference (RDT2) via email at firstname.lastname@example.org.
We hope this is helpful! Best of luck with your research!