Yes, we did several modifications to the engine to support this.
But even with those… it also require some “fancy” game code per actor type and it’s quite limited.
It’s “ok” for us as it covers a really expensive case… but it’s difficult to just apply to another system.
This said, I’m not sure we are speaking exactly about the same subject… in our case, even though weapons are actors, we treat them as if they were components of the character in terms of replication.
Is this what you need ?