Maybe? It could be cool.
I've always liked the idea of Pokémon having an equipable item, as well as the held item.
Equipable stuff being things like, Hard Armor, or Speed Boots. Giving the Pokémon a small boost in certain stats.
Weapons could fall under that, but nothing extreme like guns.
Maybe Punch Glove to up attack, or Dual Gloves, to extend the amount of hits multi-hit moves do.