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
Braverman "Stinger" Pen Gun - YouTube
Stinger Pen Pistol, Manufactured by R.J. Braverman Corp., Cal. .22 LR
Single Shot .22LR Pen Guns -The Firearm Blog
Sold at Auction: Stinger, R.J. Braverman Stinger .22LR Pen Gun