Question Particle systems and colliders with parent rigidbody.

The objects in my game are Rigidbody2D objects whose child objects have a collider. There are also guns in the game, for which I use particles as projectiles (this is relatively convenient, and I doubt the performance when using GameObjects as projectiles). For the normal operation of the guns, it is required to cause damage to the object that the particle collided with.
And this is where the problem arises: OnParticleCollision only returns a GameObject, and instead of the one that the particle collided with, the parent object with the Rigidbody is returned. Adding a Rigidbody to child objects causes collision problems or even weirder behavior.
Is there any way to determine which collider the particle has collided with, or do I still have to use GameObject projectiles?

 

When GO returned by OnParticleCollision used as the argument, GetCollisionEvents returns null as the collider. When the object that the projectile should hit used as an argument, is also returned null.