This is a branch of OKB 300, whose engines are produced at TMKB Soyuz.

- These are small rocket engines built between 1967 and 1972, running on N2O4 and UDMH. One of the main engines is the 11D79, used on the Block D SOZ, with 4.5 kgf of thrust.

- Other engines are delivering 1, 10, 16, and 40 kgf.