Not only that, sometimes they can affect the basic mechanics too. For example, some guns in Destiny 2 the range is measured from the end of the weapon model, and some skins extend the model out so the gun is further from the player. This in a one v. one scenario can give you a slight edge on one shot kill distance if you have the skin, so you can shoot earlier than an opponent without it.
Not only that, sometimes they can affect the basic mechanics too. For example, some guns in Destiny 2 the range is measured from the end of the weapon model, and some skins extend the model out so the gun is further from the player. This in a one v. one scenario can give you a slight edge on one shot kill distance if you have the skin, so you can shoot earlier than an opponent without it.