9 Spy Gadgets That Will Leave You Awestruck

By siliconindia  |  Friday, 27 March 2015, 00:56 IST

2. Pen Gun

A Pen gun is a disguised firearm that resembles an ink pen. They generally are of small caliber .22LR, .25ACP, .32 ACP, .38-caliber and are single shot. Early examples of pen guns were pin-fired, but modern designs are rim or center-fire.

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