The shieldside weapons are standalone verisons of the normal melee weapons but with the unarmed animations so you block with the shield.
Currently there is only one shield: the Trash Can Lid (MORE ARE UPCOMING)
Install with any mod manager-
There is an optional Crafting Workbench Patch to craft the Shield and the Shieldside weapons, otherwise to use the items:
help shieldside 4 (for the shieldside weapons) or help shield 4 (for the shields) then player.additem id (id is the result of the help command next to the desired item’s name)
File Details:16 KB / ZIP Download Fallout 4 – Shields and Shieldside Weapons - Modsup.com