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The AEA Harpoon is a compact pistol that packs a serious punch. With its 4-inch barrel, it propels 50-caliber slugs at approximately 600-650 feet per second, delivering up to 110 ft-lb of energy. Extending the barrel to 11 inches increases velocity to about 700-750 FPS and energy to a staggering 150 foot-lbs. When both barrels are fired simultaneously, the impact mimics that of a small cannon, creating a truly formidable force.