CHECK THE REQUIREMENTS
BypassLayerCheck.dll must be installed to /reframework/plugins.

Overview
This mod enables you to make changes to your layered equipment's weapon appearance as if you were editing a rampage weapon.
In other words, you can now freely swap between weapons or to a weaponless or different-weapon-type layered equipment loadout and this weapon will maintain it's current appearance.
You are able to quickly manage both "real" layered weapons and this mod's rampage-style layered weapons seamlessly.

How To Use
The standard method of Item Box -> Layered Equipment Settings -> Change Layered Equipment -> Weapon still applies here.
With the mod installed, selecting another weapon at this point (A button, mouse click, etc.) will change the appearance of the weapon itself rather than the current loadout.
You can similarly un-equip the current appearance by selecting the same weapon.
You can toggle between this behavior and the official layered weapon equipment system by pressing either your controller's select button or keyboard's tab key while in this menu. A REMenu checkbox is also available.

Note that this mod's approach is the same as the existing rampage layered weapon system.
These two systems interact identically to how the game natively handles it.
Refer to "Forging Layered Equipment" in-game for more context, namely:

Changing your layered weapon requires that you have the same weapon type equipped as the layered weapon you wish to use.
If a layered Rampage weapon has a layered weapon applied, the layered weapon's appearance will take priority.

Related
Consider checking out my other mod, which automatically unlocks layered weapons when you craft the real deal.