(of bullets, artillery shells, etc.) designed especially for piercing armor.
Contemporary Examples

And nobody needs a 30-round clip of high-velocity, steel-jacketed, armor-piercing ordnance for target shooting.
One Redneck’s Gun Stand Joe McLean February 12, 2013

Evidence of execution-style gunshots with armor-piercing bullets has emerged.
Ukraine Is On the Verge Of War And Putin Is To Blame Michael Weiss February 19, 2014

Furthermore, the cannon and armor-piercing bombs of Shturmovik ground-attack aircraft posed a mortal peril for the German tanks.
WWII’s Greatest Battle: How Kursk Changed the War Andrew Roberts August 30, 2013

Historical Examples

Bombs, armor-piercing shells, gas shells of poisonous and corrosive fluids followed each other in close succession.
Triplanetary Edward Elmer Smith

Just where would an armor-piercing steel bullet do the most harm?
Valley of the Croen Lee Tarbell

Then an artillery officer said, dreamily, “The armor-piercing shells the railroad guns use have lead caps.”
The Onslaught from Rigel Fletcher Pratt

Equally interesting was the construction of the armor-piercing bullet.
America’s Munitions 1917-1918 Benedict Crowell

Tell how to distinguish from the painting of projectiles used, its kind, armor-piercing quality, and nature of bursting charge.
The Gunner’s Examiner Harold E. Cloke

They were proof against the ordinary bullet but not against the armor-piercing.
War in the Garden of Eden Kermit Roosevelt

Our armor-piercing bullet was made with a cupronickel jacket for the sake of the gun barrel.
America’s Munitions 1917-1918 Benedict Crowell

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    armored cow noun phrase Canned milk (WWII)

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