Cute little fella...
Between 400-600 ft/lbs of force(depending on grain), coming out of a 12 oz. frame. That's crazy..
This the the DoubleTap .45-caliber pistol from Heizer Defense. It measures 5.5" long, 3.9" tall, and only weights 12-ounces. The gun comes in the aluminum 12-oz version ($500) and a 14-oz titanium one ($730) and holds two bullets in the piggyback barrels. It also holds an extra two in the handle.