I absolutely don't recommend 57mm rockets. Here are three options I would consider:
- S-8 and S-13 rockets can do the job. S-13 requires a single hit and S-8 requires several direct hits. Splash damage from either of the two does not deal any damage.
- Bombs (preferably CCIP, although CCRP can be used in neutral conditions). Fab-250 or 500 or RBK-500 with 10kg bomblets
- Guided missiles. any of the guided missiles fired from close range (about rocket range) should be effective.