Halo 5: Guardians dropped its free expansion Infinity’s Armory today. There are a few noteworthy changes. First, there are two new maps: Riptide (Arena) and Urban (Warzone Assault). There are also new weapons, including an Achilles armor and Carbine Rifle options.
Check out Halo Waypoint for the full list of changes, which includes amusing gifs of the new assassinations: Wind Up and Stop Stabbing Yourself.