entering the pilot's stations and becoming a hazard. The Apache is capable of carrying up to 1,200 rounds for the gun in a device known as the 12-PAK, designed and manufactured by Meggitt Defense Systems, Inc. However, utilization by the US Army of a special internal fuel tank, the Robertson IAFS (known as the "Robby Tank" to the crews), reduces this capacity to 300 rounds. The ammunition is loaded into the AH-64D Longbow Apache by armament personnel using an aircraft-mounted motorized loader and special ammunition handling tray. The AH-64A requires specialized ground support equipment for loading. The M230 is capable of firing the 30×113mm rounds used in the ADEN cannon and DEFA cannon, however, the Lightweight rounds (M788, M789, M799) used in the M230 are constructed with a light alloy as opposed to brass (ADEN) or steel (DEFA) cases to save weight and are in use with the US Army. The M230 rounds are not backwards compatible with weapons designed for the ADEN or DEFA rounds. The M788 rounds can be distinguished by the blue band near the nose, the M789 by a yellow stripe atop a black band and the M799 a red stripe atop a yellow band. The M799 HEI round is not used by the US Army due to the danger of a round exploding in the gun barrel. The M789 High Explosive Dual Purpose (HEDP) ammunition cartridge is the primary tactical round of the Apache AH-64 helicopter, widely used in current combat operations. The Apache's ability to provide accurate air support with minimal collateral damage led to increased use and volume demands for M789 ammunition. The M789 is typically used in the M230. Each round contains of explosive charge sealed in a shaped-charge liner. The liner collapses into an armor-piercing jet of metal that is capable of penetrating of rolled homogeneous armour at 500m. Additionally, the shell is also designed to fragment upon impact. The lethal radius against unprotected, standing targets is about under optimum conditions. Variants M230LF and MAWS The M230LF, offered by Orbital ATK, is a more capable version of the Apache autocannon. Features include an anti-hangfire system, a delinking feeder that exploits linked ammunition, and an extended-length barrel, which results in greater muzzle velocity and hitting power from the same M789 HEDP and NATO standard ADEN/DEFA projectiles. The rate of fire is reduced to 200 rounds/minute and overall length decreased to . The