Hi there,
Thanks for the video, that was really helpful to diagnose this issue.
I believe the bullet from the weapon component is being blocked by the gun prop you have attached to the same object. To fix this you could set the Prop's 'Collision Type' to None, or if you want to prop to keep its collisions, move it to a different gameobject, possibly as a child, which you can then position freely to move the prop behind where the weapon component is firing from.

This does highlight a minor visual issue where the weapon's 'Trail Effect' goes through solid objects, which in this case makes it seem like the bullet isn't being blocked. The 'Bullet Effect' should be correctly blocked by solid objects, so you can rely on that to tell if the bullet is being blocked or not.

Let me know if that doesn't solve the problem, thanks
- Charlton