Although the can carry considerable disposable stores, its primary built-in weapon is the 30 mm Avenger Gatling gun. One of the most powerful aircraft cannon ever flown, it fires large depleted uranium armor-piercing shells.
The Spectre (Attack Cargo Plane Project II) currently retired/replaced with the J model Ghostrider. Spectres weapons consisted of twin cannons (mid pic), one Bofors cannon and one Howitzer (bottom pic). See the top pic, there are