Need help with gun animation system.

The system I am trying to create cannot use one single animation for holding, shooting, and reloading the gun, as there are multiple guns in my game that each have there own unique reload, holding, and firing animations. What is the most efficient way to link multiple reload animations to the player and play the one that corresponds with the gun the player is holding?
Note: When I say "holding", I mean the animation that is played that makes the player appear to be holding the gun.

 

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