Replication doesn’t work like that, It’s not that easy. bReplicates simply tells the game that at some point, you want to replicate properties from Server to Client. It doesn’t necessarily know what or more importantly, how to do it. You need to write discrete code that tells the clients to only show one weapon for example. Just making it a replicated value does nothing.
I suggest looking at ShooterGame code to get an idea of how this works, and also doing some further reading here:
https://wiki.unrealengine.com/Networking/Replication
https://wiki.unrealengine.com/Replication
https://wiki.unrealengine.com/Network_Replication,_Using_ReplicatedUsing_/_RepNotify_vars
Multiplayer / Networking is a complex beast. It’s worth experimenting to get the gist of how it works before attempting something too complex.