6 Rnd Tube Share Tweet Share Magazine | COD Black Ops Cold War Attachments Attachment TypeMagazine 6 Rnd Tube Stats - Pros and Cons: Magazine Ammo Capacity 20 Max Starting Ammo 20 Ammo Capacity 20 Weapon Blueprints That Equip 6 Rnd Tube: Battle Worn Chestnut Chimney Sweeper Headache Last Stop Nightfall GRU Mag Clamp 9 Rnd Tube