In addition to the experimental works at factory #9 that I have wrote about in quarterly reports, the following were completed in the 4th quarter:
1. 122 mm "D-30" tank gun with ballistics from the "D-25" tank gun.
Factory #9 completed experiments on the prototype tank gun (under its own initiative), which consists of:
- D-25's monobloc;
- D-10's breech and gas block;
- Balancing mechanism with two springs;
- Lengthened D-25 mount;
- Fume extractor mechanism.