20mm rounds

20mm 250 ammo ammunition and armor armour armoured auto barrel belts big bullet bullets cannon case casing charge defeat depleted drive electrically f15 f15sg f16 fighter firepower for gas gatling gun hydraulic hydraulically inbuilt jet live load loading m61 machinegun metal metallic minigun munitions penetrate penetration penetrator pierce piercing power powered propellant rate round rounds silver size smokeless stopping tank tanks the uranium vehicles vulcan war warplane