Trouble assigning Gameobject to variable in separate object

Hello,

I have a weapon object that can be picked up with "E" and once equipped it should fill in a space called right hand on a list of variables i have attached to the player. I've looked this up many times and no matter what I try nothing works. No errors, the variable just stays null. Please, if you have any idea what I am doing wrong I would greatly appreciate the help!

Here's the code that should be doing the job ( JS ):

      if (equipped)
              {
 //sorry about the mess
          transform.parent = righthandspace.transform;
                 transform.localPosition = rightHandPosition;
                 transform.localRotation = rightHandRotation;
                 this.attachedRigidbody.useGravity = false;
                 targetScript.RightHandSlot = self;
 //here are the problem lines
                 player.GetComponent(carryslots).RightHandSlot = this.GameObject;
                 self.tag = "CurrentWeapon";
              }

P.S, It should also be setting the tag of the weapon object to "CurrentWeapon" when equipped, but that isn't working either. If you can help with that too that would be awesome! :)

Thanks!