Stinger Pen Gun 25 ACP
The Stinger Pen Gun, a single-shot .25 ACP novelty firearm, was manufactured from the early 90s to 2004. It legally bypasses ATF's 'Any Other Weapon' classification by requiring transformation into a pistol shape to fire. Designed by R.J. Braverman and produced by American Derringer Corp. and others, it's now a valuable collector's item, appreciating significantly over time.









