World's smallest .45 caliber pistol

You're looking at what's perhaps the world's most compact .45 caliber pocket pistol.

Despite sporting dimensions similar to a standard smartphone (5/8ths of an inch thick) and weighing only 14 ounces, the DoubleTap features a no-snag, hammerless design (firing mechanism is internal) that's capable of the kind of precision and efficiency offered by high-performance .45 caliber handguns. And, according to the manufacturer, Heizer Defense, you won't find a slimmer and lighter pocket pistol anywhere on the market.

For gun enthusiasts, here's a rundown of the handgun's features as highlighted on Heizer's website:

Available in .45 ACP or 9MM

A patent-pending progressive barrel porting option that cuts muzzle rise and recoil.

A one-of-a-kind double-action trigger system that utilizes ball bearings for a smooth action and crisp trigger pull.

Designed to hold two rounds in the chamber and two additional spare rounds inside the handle

Buyers can choose between an aluminum model that starts at $500 or one made out of titanium with a MIL-STD finish, the same used on military aircraft, for a protection against corrosion and wear damage for $730.

The DoubleTap is slated to go on sale in the first quarter of 2012.

Here's some videos showcasing the new firearm: