vessels and the HMMWV tactical vehicle, with its latest use being within the XTR-101 and XTR-102 weapon stations. T-82T 20mm Twin Anti-Aircraft Cannon The T-82 20mm Twin Anti-Aircraft Cannon as the basis for the T-75 autocannon developed by Taiwan (Republic of China). Projectile specifications Projectile weight: 101 g (3.56 oz) Types M56A3:HE-I with a 10.7-gram RDX explosive charge and a 1.3-gram incendiary charge M242HE-I-T M53AP-I steel tip has a 50% chance of penetrating 6.3 mm of RHA at a range of 1,000 meters and striking angle of 0°. M775AP-I-T M55A2TP M220TP-T See also List of U.S. Army weapons by supply catalog designation (SNL A-91) Mauser BK-27—comparable German design References External links Pontiac M39 20mm cannon (USAF source) FM 1-140 20mm ammunition data 20x102mm Aircraft guns Autocannon Weapons and ammunition introduced in 1952