Adjective
armour-piercing (not comparable)
(military, British spelling) alternative form of armor-piercing
These designs were known either as armour-piercing composite rigid (APCR), high-velocity armor-piercing (HVAP) and "hartkern" (hard core) (resp. by the British, US and Germans). Source: Internet
Interestingly, armoured vests managed to hold off bullets shot from an AKM automated rifle and even armour-piercing sniper SVD. Source: Internet
Between 1941 and 1943, the British combined the two techniques in the armour-piercing discarding sabot (APDS) round. Source: Internet
Semenoff (1907) p. 63 The Russians used armour-piercing rounds with small guncotton bursting charges and unreliable fuses. Source: Internet
The two 37 mm (1.46 in) cannons were mounted in under-wing gun pods, each loaded with two six-round magazines of armour-piercing tungsten carbide -cored ammunition. Source: Internet
This automatic cannon is mounted near the centre of fuselage and carries 460 high-fragmentation, explosive incendiary, or armour-piercing rounds. Source: Internet