Those large quad mounts look more like the 57mm type mounts.
The question is where do you get this from (chinese modder)? i look on Soviet ships high-tier models none of them have radar guided mounts 25mm. The 25mm/79 did existed however, they're post-war Soviet AA mounts, the quad mounts designated as 4M-120 are mounted on Stalingrad, Pr.41 DD and Project 24 battleships.
The bigger quad AA mounts are 57mm ZIF-75 just in case anyone confuse.