Who manufactured the us weapons for soldiers in Vietnam?

US automobile companies manufactured the Patton (M48A3) tanks, M41 light tanks, and M551 Sheridan Armored Airborne Reconnaissance Assault Vehicles (today called light tanks). Civilian boat companies built the Swift Boats, Alpha Boats, and PBR's for the Riverine forces. And gun companies manufactured the new M16 assault rifles, machine guns, pistols, etc. Ammunition companies manufactured the bombs, artillery shells, and small arms ammo. Helicopter companies, such as Bell, Sikorsky, Hughes, etc. built the choppers; and the jets were built by airplane companies, such as McDonnell-Douglas, North American, Lockheed, Chance-Vought, Boeing (B-52's), etc.