An armor piercing capped ballistic cap is a variety of armor-piercing shell introduced in the 1930s.

An APCBC is an armor-piercing capped ballistic cap - a variety of armor-piercing shell introduced in the 1930s.

An armor-piercing shot was a variety of solid metal projectile with no bursting charge, in use mainly during World War II.

An APCR is a armor-piercing composite rigid, a variety of lightweight full diameter carrier shell.

It all depends on your definition of "armor" and "armor piercing".