6. Custom Weapons
So we've already got customisable armour, but what about our weapons? Weapon customisation is a staple of the modern FPS, with good reason. Being able to customise our weapons would let us add a new layer of personalisation to our characters, adding even more depth to what is already a great multiplayer series. Creating certain loadouts to cater to our favourite playstyles would be a great addition to the Halo experience. Why not stick a silencer on your pistol and sniper for a stealthy character. Or for the more gung-ho players, how about a bayonet for the end of your Battle Rifle? Even if these additions were purely cosmetic I'd still welcome the option to add a few gadgets to my favourite guns.