How do i remove a weapon when i want to replace it with another

How do i remove a weapon when i want to replace it with another

read a tutorial on alpha channels, and you do know that both of your threads in here are answered in two other threads

use the search function

The easy way is to load a weapon and use the blood mage's sphere ability or a special effect trigger to add the weapon to the unit. Again you will want to read about alphaing out the original weapon.