GameplayAbilities get Ability instance

Hey,
I really need your help here, I’m new to UE4 and tried to implement the GAS which looks good so far.
However I encountered a huge problem:
I have made a new class called UWeaponGameplayAbility which Inherits from UGameplayAbility.
The Weapon class has the following properties: Ammunition, ClipSize, and Icon also every WeaponAbility is set to instanced per owner.
Now… How do I access this instance so I can show Ammo etc in the HUD for the player?
Keep in mind that I want to make this game multiplayer and I’m totally screwed by now.

I hope I provided enough information and someone can help me.

Thanks !

have you seen this GameplayAbilities and you. - Community Content, Tools and Tutorials - Unreal Engine Forums