Custom weapon textures?

I just happened to notice when I killed someone after waiting half an hour for a game that their weapon had a different texture on it. I would be super excited to see a ton of customization added to this game!

Has anyone else noticed this? or is there just something in the settings I am missing?

What Halo was this?

Assuming this was Halo 4, and yes, under the LOADOUTS tab in the start menu, you’ll have an array of skins for your weapons.