Player now goes through the floor on shooting

so first i get this when i set up the shoot on mouse click. it looks like this

im not really sure what to do because i bought this pack https://www.assetstore.unity3d.com/en/#!/content/66384
but when i try to use the
shooting animation i get this? any help?
maybe it has something to do with it being a partial animation where the feet is not animated?

Do the 2 Animator controllers in the asset pack not work how you want them to?

Looks like you need to inspect the way the animator controllers are setup and mimic those. The animations were created for that specific setup, to have a full animation playing on the model with layer masks to override the lower layers.

Also - research documentation on mecanim animation layers and layer masks.