Attaching a Model to a unit when Item is picked up

[Aud]

Basically I'm trying to make a Weapon appear equipped on a unit when it picks up a specific item.
So far this is what I've tried:

Adding a Behavior in the "Carry Behaviors" of the Item (couldn't find a way to attach a model or actor there)

Adding an Effect under the "Effect" of the item (couldn't find a way to attach a model or actor to a unit by using an effect)

Using Triggers to attach a model to attachment point when Item is picked up (Couldn't manage to validate the unit type as the item I'm doing this for)

I'd really like any pointers on how I can get this to work, preferably without using triggers.