The Soviet Navy purchased a number of Bofors 25 mm Model 1933 guns in 1935, trials of the weapon were successful, and it was decided to develop a 45 mm version of the weapon designated the 49-K. The development under the guidance of leading Soviet designers M. N. Loginov, I.
The Soviet Navy acquired Bofors 25 mm Model 1933 guns in 1935, trials were successful, and a larger version was developed, designated the 49-K, under the guidance of leading Soviet designers M. N. Loginov and I.