Skins

Weapon skins are features in Halo 4, Halo 5: Guardians, and Halo: Online that allow players to customize their weapon's aesthetic, in a similar way to armor permutations.

For a more detailed article, see:
 * Weapon skins (Halo 4)
 * Weapon skins (Halo 5: Guardians)
 * Weapon skins (Halo: Online)