The Anti-Tank Machine Gun

It seems like tank cannons always increase their effectiveness by becoming larger and more powerful, but this isn’t a universal constant. In the 1970s, the United States Army sought to create what they called an “Anti-Tank Machine Gun“, a very large autocannon that would fire fast enough to defeat waves of Soviet tanks. The program was relatively successful and was pursued into the mid 80s. The 75mm XM274 medium caliber anti-armor automatic cannon (MCAAC) was mounted on a variety of vehicles such as the RDF/LT and HSTV--L. It was quite powerful, but ultimately canned for a number of good reasons. Check the channel “About“ section for the link to the creator of my profile picture. Sources: Concept Studies of the main armament of future armored fighting vehicles (AFVs): Phase 1 (Think Tank) [DEFE 15/2602] 75mm Automatic Cannon; Development, Performance, Maturity, and Specifications - Ares Inc. Jane’s Armour and Artillery 1985-86 United States Army Combat Forces