
(from the article `tank`) For a time the U.S. Army also subscribed to a policy of developing heavy as well as medium tanks. But the heavy M103 tank, armed with a ...
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http://www.britannica.com/eb/a-z/m/1
(NGC 1912) M103. Image credit: NOAO/AURA/NSF A young, bright, remote open cluster in the constellation Cassiopeiae. It was discovered by Pierre Méchain in 1781. M103 has an estimated age of 20 million years. Most of its stars are hot and blue. However, close to the cen...
Found on
http://www.daviddarling.info/encyclopedia/M/M103.html

The M103 was an unsuccessful American heavy tank produced between the 1950s and 1960s. The M103 was armed with a 120 mm rifled gun, 7.62 mm coaxial machine-gun and a 12.7 mm anti-aircraft machine-gun mounted on the commander' s cupola. The M103 was manned by a crew of five, and protected by armour 12. 7 to 178 mm thick. A Continental AV-1790-5B or ...
Found on
http://www.probertencyclopaedia.com/browse/FAFVM.HTM
No exact match found.