Dear Mr. Schneider,
Thank you for posting your request on History Hub!
The SF115 you refer to was created in 1978. According to this 1979 NARA SF115, the records are cut off annually and transferred to the US Army Reserve Components Personnel and Administration Center after one year. The name of the organization has changed since then. There is no indication on either SF-115 that these records were microfilmed.
We suggest contacting the Army Human Resources Command. This link will take you to a page that denotes the DA 1379 (included in the Reserve Unit Attendance Files) and includes a phone number, email address, and mailing address for AHRC.
We hope this information is helpful.