To be able to make this work you need some animation experience but should be very easy to set up!
Preview:
https://imgur.com/a/MyyOUTj Small tutorial on setting it up:
1. Drag both prefabs in to your scene.
2. Attach the sniper to your wrist.
3. Put a rigidbody component on your wrist, put angular Drag on 0, disable gravity, turn on all the constraints.
4. Put the shot prefab in front of the muzzle and rotate it so the particles shoot out the right way.
5. Add a fixed joined component to the shot prefab and put angular Drag on 0, disable gravity.
6. Drag in the wrist into the fixed joint component.
7. Make a gesture override for taking out the gun and shooting the gun just make sure you turn on/off the Sniper Shot gameobject for the shooting animation otherwise the position fo the cube breaks!
Have fun with it!
Assets (27 files inside Unity Package)
/Assets/Wigo/Crossfire Sniper/Sniper shot.prefab
/Assets/Wigo/Crossfire Sniper/Sniper.prefab
/Assets/Wigo/Crossfire Sniper/Dependancies/tex_vfx-ult_particle_sprite_droplet 1.png
/Assets/Wigo/Crossfire Sniper/Dependancies/Emission shader.shader
/Assets/Wigo/Crossfire Sniper/Dependancies/Sniper 3.mat
/Assets/Wigo/Crossfire Sniper/Dependancies/Particle 3.mat
/Assets/Wigo/Crossfire Sniper/Dependancies/Sniper_3.jpeg
/Assets/Wigo/Crossfire Sniper/Dependancies/Default particle.mat
/Assets/Wigo/Crossfire Sniper/Dependancies/Sniper_N_3.jpeg
/Assets/Wigo/Crossfire Sniper/Dependancies/Smoke_07.png
/Assets/Wigo/Crossfire Sniper/Dependancies/Sniper 2.mat
/Assets/Wigo/Crossfire Sniper/Dependancies/Breathing Animation.anim
/Assets/Wigo/Crossfire Sniper/Dependancies/Sniper shot Sound Effect .ogg
/Assets/Wigo/Crossfire Sniper/Dependancies/Crossfire Sniper.controller
/Assets/Wigo/Crossfire Sniper/Dependancies/Sniper_1.jpeg
/Assets/Wigo/Crossfire Sniper/Dependancies/Sniper_N.jpeg
/Assets/Wigo/Crossfire Sniper/Dependancies/Crossfire Sniper.fbx
/Assets/Wigo/Crossfire Sniper/Dependancies/Sniper_2.jpeg
/Assets/Wigo/Crossfire Sniper/Dependancies/Particle 1.mat
/Assets/Wigo/Crossfire Sniper/Dependancies/redtrail 1.png
/Assets/Wigo/Crossfire Sniper/Dependancies/Sniper_N_2.jpeg
/Assets/Wigo/Crossfire Sniper/Dependancies/Sniper 1.mat
/Assets/Wigo/Crossfire Sniper/Dependancies/sharp_red 1.png
/Assets/Wigo/Crossfire Sniper/Dependancies/Sniper_E.jpeg
/Assets/Wigo/Crossfire Sniper/Dependancies/Particle 2.mat
/Assets/Wigo/Crossfire Sniper/Dependancies/Particle.mat
/Assets/Wigo/Crossfire Sniper/Dependancies/Sniper_E_2.jpeg