Sultry, Sinister, and Strange: The Stinger Pen Gun - Small Arms Review
Pugio PEN-15 AOW Pen Gun - Aklys Defense LLC
22.cal handmade pen gun(first skitzogun I ever built) : r/CursedGuns
Bootleg Gunz:The Bazaar of Bizarre Guns - "A .22lr pen gun made from a $3 automatic center punch tool. The key ring is simply pulled back and released to fire. These same