How to Properly Replicate Custom Actor Components in Multiplayer (UE5)

Development Programming & Scripting Blueprint
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Hi everyone,

I’m working on a multiplayer project in Unreal Engine 5, and I’ve run into an issue when trying to replicate a custom UActorComponent. Here’s the situation:

  • I have a custom actor component that handles some gameplay logic (e.g. inventory or status effects).

  • The component is added to a character class (derived from ACharacter) in both Blueprint and C++.

  • I’ve set bReplicates = true in the constructor, and I’ve also tried setting SetIsReplicatedByDefault(true) just in case.

  • The owning actor (the character) replicates fine, but the component doesn’t seem to replicate its variables or function calls as expected.

What’s the correct way to make sure that custom components replicate properly in multiplayer? Do I need to manually replicate variables using GetLifetimeReplicatedProps inside the component class, or is there something I’m missing on the actor side?

Any help, examples, or even documentation links would be greatly appreciated!

Thanks in advance.

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yep you need the DOREPLIFETIME macro and also set the variable to replicated