WWII Era 50 cal pen with armor piercing bullet

Some of you will recall my write up on a modified way to make 50 cal pens using 3D printed inserts and ball bullets

50 Cal Bullet Pen Kits, Pen Kits

Armor-piercing bullet - Wikipedia

U.S Snipers - Military cartridge types.. The .50 BMG cartridge

INERT 75 mm Armor-Piercing M72 Round with M18 case

Is there such thing as armor piercing shotgun shells? - Quora

WW2 Armor - Now hear this! With multiple types of

High Caliber Craftsman - 50 Cal Shredded Money Bullet Pen - US Made

M1 Garand + Vintage WW2 Armor-Piercing Ammo vs HARD DRIVES

50 Caliber Bullet Pen EHC00842 Cal Casing Fired Pin Gift Fire Hunt

Can Anything Defeat a Level IV Plate Body Armor? -The Firearm Blog

WWII 50 Caliber Headstamps