The British Army’s new Challenger 3 main battle tank represents a significant upgrade, centered on its new Rheinmetall L55A1 ...

As that shell leaves the barrel, the hollow space in ... on a vast number of different Main Battle Tank (MBT) cannons ranging from the standard 120-mm guns found on the U.S.'s formidable M1A2 ...

The new tank will emerge after the Army first fields its M1A2 SEP ... It uses a breech that is large enough to accept 140 mm ammunition and be mounted with both a 120 mm barrel and a 135 mm or 140 mm ...