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

WWII Era 50 cal pen with armor piercing bullet

Can armor piercing 0.50 cal penetrate the armor of a Stryker? - Quora

50 Cal Bullet Pen Kits, Pen Kits

50 BMG - M2 Browning WWII Headstamps - Snap Caps

Could a .50 caliber Browning penetrate German Mark 2 or 3 S armor

WWII Era 50 cal pen with armor piercing bullet

High Caliber Craftsman - 50 Cal Armed Forces Bullet Pen - Made in USA

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

Feeding WW2 U.S. .50 Cal. Browning Machine Guns: Part I - Small

How Much Paper Does it Take to Stop a 50cal?

M2 Browning - Wikipedia

7.92×57mm Mauser - Wikipedia