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 Bullet Pen – History Salvaged

50 CAL ARMOR PIERCING INCENDIARY DESTRUCTION

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WWII Era 50 cal pen with armor piercing bullet

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Wwii 50 Cal

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Wwii 50 Cal

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Wwii 50 Cal

50 Cal Bullet Pen Kit — WoodWorld of Texas