Tools Not Showing Up on Custom Rig

We have a completely custom rig, and whenever a tool is equipped, the arm does go up but the tool isn’t there.

Here’s a picture:

To my knowledge, everything has been done correctly. Here’s how the tool looks:
Screenshot 2023-05-04 at 10.45.37 am

Please if anyone has any ideas, let me know.

-It’s not anchored
-it has been re-welded