Create a Shootable Weapon From Scratch
Overview
Here are the steps for creating a shootable weapon from scratch. Let's use the pistol animations as an example for this exercise
Animations
The animations for any Shootable weapon should be an upped body animation.
This animation will be masked to be played on the Upper Body Layer; Since these animations can be used while running, jumping, etc.

To create a correct blend-tree, Aim and Fire animations in all directions are needed.
South Positive, West, North, East, and South Negative animations are needed.
The shootable weapon can be used with only one animation when using strafing on the Animal Controller) but it won't be useful when riding a Horse. That is due to the horse moving on a different direction than the aiming direction
Aim Animations
The main aim animation needed is the North Aim animation (Aiming Forward)

With these 5 animations you can create the proper Blendtree using the Aim Horizontal Animator Parameter

Fire Animations

With these 5 animations you can create the proper Blendtree using the Aim Horizontal Animator Parameter

Reload Animations
If the weapon can reload you will apply only one animation.

Arm Pose Animations
There are several Arm Pose Animations created to hold weapons inside the Animal Controler, you can find those here in this path:

These are simple poses that are played in loop while the weapon is equipped
Animator
Mode
Abilities
IK
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