Short for Armour Piercing Composite Rigid, this is a type of tank shell that uses a soft external casing to enclose a dense kinetic-energy penetrator which can pierce heavy armour. It’s infamous in War Thunder for being unreliable, as the shrapnel damage caused by the round’s core is small and often doesn’t injure crew. The concept of this sort of round was improved upon with the introduction of Armour Piercing Discarding Sabot (APDS) rounds.
Damn, I do hate using APCR rounds in War Thunder.
APCR (armor pircing composit rigid) is a type of shell commonly used in WWII. When the shell is fired it looks like ap shell but when it hits a thing thock enough, tge soft oiter layer digs in but the dense core goes in.