(TGS) The Boeing–Sikorsky RAH-66 Comanche was intended to have a gun system designed jointly by Boeing and Sikorsky. The system was to use the XM301 lightweight gun, and fed linked ammunition from a 500-round storage drum. The turret itself had 120 degrees of movement in azimuth, with 15 degrees of elevation and 45 degrees of depression. The TGS was supposed to be ready for deployment with the Comanche helicopter during the FY04 period, but the cancellation of the Comanche project in 2004 ended further development of this system. References Citations Sources Government documentation Fails, Lt Col William R. Marines and Helicopters 1962-1973. Washington, DC: History and Museums Division Headquarters, U.S. Marine Corps, 1978. Squieler, Gerald J. Final Report on Engineering Test of Grenade Dispensing Adapter, LWL GDA-3 (Safety Release). Aberdeen Proving Ground, MD: US Army Test and Evaluation Command, 1966. United States. Department of Defense. DOD 4120.15-L Model Designation of Military Aircraft, Rockets, and Guided Missiles. Washington, DC: Department of Defense, 1974. United States. Headquarters, Department of the Army. FM 1-40 Attack Helicopter Gunnery. Washington, DC: Headquarters, Department of the Army, 1969. United States. Headquarters, Department of the Army. TM 9-1300-200 Ammunition, General. Washington, DC: Headquarters, Department of the Army, 1993. United States. Headquarters, Military Assistance Command Vietnam. Lessons Learned Number 51: Operational Employment of Riot Control Munitions. Saigon, Vietnam: Military Assistance Command Vietnam, 1965. United States. Naval Air Systems Command, Department of the Navy. MIL-F-85668(AS) Military Specification Fire System, 20-millimetre Point And Suppressive Helicopter, AH-1T (TOW), A/A49E-7(V4). 1984 United States. Naval Air Systems Command, Department of the Navy. MIL-F-85668(AS) Military Specification Fire System, 20-millimetre Point And Suppressive Helicopter, AH-1T (TOW), A/A49E-7(V4), Notice 1. 1995 United States. Office of the Chief of Naval Operations, Department of the Navy. OPNAV Instruction 8000.16B Naval Ordnance Maintenance Management Program (NOMMP). Washington, DC: Department of the Navy, 2003 United States. United States Air Force. T.O. 1H-3(C)E-1, Flight Manual, USAF Series, CH-3E and HH-3E Helicopters. 1982 United States. United States Army Test and Evaluation Command, Headquarters, US Army Aviation Test Activity. Report of the Engineering Flight Test Performance Phase of the OH-5A Helicopter Unarmed (Clean) and Armed with the XM-7 and XM-8 Weapon Subsystem, Part II. Edwards AFB, CA: Headquarters, US Army Aviation Test Activity, 1964 Secondary sources Drendel, Lou. Gunslingers in Action. Carrollton, TX: Squadron/Signal Publications, Inc, 1974. . Drendel, Lou. Huey. Carrollton, TX: Squadron/Signal Publications, Inc, 1983. . Gervasi, Tom. Arsenal of Democracy