The HK4 in .380 ACP (9mm Kurz) uses the same straight blowback frame as the .32 version with a caliber-specific barrel and magazine. The .380 variant was marketed primarily to European law enforcement agencies who preferred the slightly more powerful chambering for duty use. Type: Pistol Action: Semi-Automatic Caliber: .380 ACP Capacity: 8 Year introduced: 1967, Germany Weight: 18 oz Overall length: 6" Status: Discontinued Intended use: law_enforcement, concealed_carry