9mm Uppers

AR9 Upper Receivers are the most popular pistol caliber AR-15. 9mm Uppers are available from Always Armed in rifle and pistol length format and many different cerakote colors like FDE and Titanium Gray. AR-9 upper builds will require a dedicated 9mm lower or a 9mm lower drop in block along with a 9mm Bolt carrier group. Check out the other parts after your upper choice in our AR9 Parts category.